This answer assumes a year spent on the road, visiting one national park after the other. With an average visit of one week per park, or four parks per month. The camper (RV) being a self-contained; trailer or motor home with fresh & grey/black water holding tanks. The optimal RV site being in the park, with at least electrical hookups available, and the site reservable in advance. Optimal temperature range for visiting the park is a low of 32 F or above, and high of 89 F or below.
January
Park: Carlsbad Caverns State: New Mexico Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Vehicle or RV camping is prohibited.
Reserve: White’s City RV Park is closest 575-785-2291
Primitive Camping Options: Hike, Horse; non-reservable
Park: Guadalupe Mountains State: Texas Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Nearest Comercial is outside of Carlsbad Caverns
Primitive Camping Options: Hike, Drive, Horse; non-reservable
Park: Saguaro State: Arizona Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: None -Camp sites are not accessible by vehicles and must be hiked to, at 6 designated campgrounds within the Saguaro Wilderness Area
Reserve: Nearby state park "Catalina State Park’" with electrical hookups https://azstateparks.itinio.com/catalina/
Primitive Camping Options: Hike; Permits may be issued up to two months in advance, but no later than noon on the day of departure. All applications by mail or fax must be complete to process. Questions? Call the visitor center at (520) 733-5153.
Park: Joshua Tree State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: State parks and commercial options, To many variables to suggest a defualt
Primitive Camping Options: Hike, Drive, Horse; Some reservable
February
Park: Death Valley State: California,Nevada Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Furnace Creek campground has full hookups
Reserve: http://www.recreation.gov/camping/furnace-creek/r/campgroundDetails.do?contractCode=NRSO&parkId=70978
Primitive Camping Options: Hike, Drive, Horse; non-reservable
Park: Channel Islands State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: There are no facilities for RV camping, and tent camping requires a boat to get to the park's islands.
Reserve: State parks and commercial options, To many variables to suggest a defualt
Primitive Camping Options: Boat; reservations required
Park: Sequoia State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: State parks and commercial options, To many variables to suggest a defualt
Primitive Camping Options: Hike, Drive, Horse; Some reservable
Park: Redwood State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Multiple options https://www.nps.gov/redw/planyourvisit/lodging.htm
Primitive Camping Options: Hike, Drive, Horse; reservations recommended.
March
Park: Pinnacles State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Pinnacles Campground (Consesion)
Reserve: https://www.recreation.gov/camping/pinnacles-campground-ca/r/campgroundDetails.do?contractCode=NRSO&parkId=73984
Primitive Camping Options: Drive; reservations recommended.
Park: Yosemite State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: State parks and commercial options, To many variables to suggest a defualt
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: Zion State: Utah Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Many options, Sand Hollow State Park with hookups is nearby http://www.reserveamerica.com/camping/sand-hollow-state-park/r/campgroundDetails.do?contractCode=UT&parkId=345761
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: Arches State: Utah Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: http://www.discovermoab.com/campgrounds_private.htm
Primitive Camping Options: Drive; Reservations recommended. Effective September 6, 2016, Arches National Park has suspended backcountry overnight use while staff examine whether current backcountry management allows for adequate protection to park resources.
April
Park: Black Canyon of the Gunnison State: Colorado Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: South Rim Campground (loop B)
Reserve: http://www.recreation.gov/co/south%20rim%20campground%20(co)/campground/r/campgroundDetails.do?contractCode=NRSO&parkId=74059
Primitive Camping Options: Drive; Some reservable
Park: Petrified Forest State: Arizona Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Petrified Forest National Park does not have campground facilities.
Reserve: Multiple Nearby, some are National Forests with amenties and reservable https://www.fs.usda.gov/activity/asnf/recreation/camping-cabins
Primitive Camping Options: Hike; Non-reservable
Park: Capitol Reef State: Utah Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: http://www.capitolreef.org/lodging.html
Primitive Camping Options: Hike, Drive, Horse; non-reservable
Park: Kings Canyon State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: State parks and commercial options, To many variables to suggest a defualt
Primitive Camping Options: Hike, Drive, Horse; Some reservable
May
Park: Bryce Canyon State: Utah Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: https://utah.com/campgrounds/bryce-canyon-national-park
Primitive Camping Options: Hike, Drive; some reservable
Park: Grand Canyon State: Arizona Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Adjacent, Mather Campground, Trailer Village (Concession) offers paved RV sites up to 50 feet in length with full hook-ups.
Reserve: https://gc.synxis.com/rez.aspx?Hotel=63275&Chain=398&Arrive=1/1/2015&_ga=1.32018878.1891428768.1413476050
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: Rocky Mountain State: Colorado Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: The 'Ranger Lakes Campground' in 'State Forest' state campground has electricity http://cpw.state.co.us/placestogo/parks/StateForest/Pages/Camping.aspx
Primitive Camping Options: Hike, Drive, Horse; some reservable
The fourth week of May is for driving between Rocky Mountain & Acadia. This trip plan began in Acadia the first week of June. Leaving a one week gap and the longest distance between parks here.
June
Park: Acadia State: Maine Region: North Atlantic
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Schoodic Woods Campground
Reserve: http://www.recreation.gov/camping/schoodic-woods-campground/r/campgroundDetails.do?contractCode=NRSO&parkId=74299
Primitive Camping Options: Hike, Boat, Drive, Horse; Reservations recommended.
Park: Shenandoah State: Virginia Region: Northeast
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Shenandoah River State Park http://www.reserveamerica.com/camping/shenandoah-river-state-park/r/campgroundDetails.do?contractCode=VA&parkId=140160
Primitive Camping Options: Hike, Drive, Horse; Some reservable
Park: Cuyahoga Valley State: Ohio Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: No RV camping or overnight parking. West Branch State Park is the nearest state park
Reserve: http://ohiostateparks.reserveamerica.com/camping/west-branch-state-park/r/campgroundDetails.do?contractCode=OH&parkId=960039
Primitive Camping Options: Hike, Boat, Drive, Horse; Reservations recommended (required peak).
Park: Isle Royale State: Michigan Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: 36 campsites located across the island. Campsites are accessible only by foot or watercraft. Cascade River State Park appears to be nearest with electric ~44 miles south of Grand Portage
Reserve: http://www.dnr.state.mn.us/state_parks/cascade_river/camping.html
Primitive Camping Options: Hike, Boat; non-reservable
July
Park: Voyageurs State: Minnesota Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: All park campsites are only accessible by watercraft.
Reserve: See park paper for current lists of Commercial with amenities, https://www.nps.gov/voya/learn/news/newspaper.htm
Primitive Camping Options: Boat: Reservations required
Park: Theodore Roosevelt State: North Dakota Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Nearby with hookups Sully Creek State Park http://www.parkrec.nd.gov/parks/scsp/scsp.html
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: Badlands State: South Dakota Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Cedar Pass Campground
Reserve: https://foreverresorts.rzda.net/cedarpass/
Primitive Camping Options: Hike, Drive; non-reservable
Park: Wind Cave State: South Dakota Region: Midwest
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Several Campgrounds with hookups in Custer State Park http://gfp.sd.gov/state-parks/directory/custer/campgrounds/
Primitive Camping Options: Hike, Drive; non-reservable
August
Park: Grand Teton State: Wyoming Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Signal Mountain Campground has one site with full hook-ups and 24 sites with electric hookups. Colter Bay RV Park and Headwaters Campgrounds & RV sites do have full hookups. The campgrounds operate on a first-come, first-served basis, advance reservations are not accepted.
Reserve: Headwaters Campground and RV sites at Flagg Ranch , Reservations team, please call 307-543-2861.
Primitive Camping Options: Hike, Boat, Drive, Horse; non-reservable
Park: Yellowstone State: Wyoming,Montana,Idaho Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Fishing Bridge RV Park (consesion)
Reserve: http://www.yellowstonenationalparklodges.com/lodging/camping/fishing-bridge-rv-park/
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: Glacier State: Montana Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: https://glaciermt.com/camping.php
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
Park: North Cascades State: Washington Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Multiple state parks with amenities & reservable http://parks.state.wa.us/
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
September
Park: Olympic State: Washington Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Multiple state parks with amenities & reservable http://parks.state.wa.us/
Primitive Camping Options: Hike, Drive; Some reservable
Park: Mount Rainier State: Washington Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Nearby Alder Lake Park https://washington.goingtocamp.com/AlderLake-TacomaPowerPark
Primitive Camping Options: Hike, Drive; Some reservable
Park: Crater Lake State: Oregon Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Mazama Village Campground has 214 tent and RV sites, accommodating tents up to 12’ x 12’ and RVs up to 50 feet in length. All sites with hookups are available on a same day, first come, first serve basis.
Reserve: http://www.craterlakelodges.com/lodging/reservations/
Primitive Camping Options: Hike, Drive; some reservable
Park: Lassen Volcanic State: California Region: Pacific West
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Nearby NFS campgrounds Merrill & Hallsted; http://www.reserveamerica.com/
Primitive Camping Options: Hike, Boat, Drive, Horse; Some reservable
October
Park: Great Basin State: Nevada Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: 3 commercial campgrounds nearby https://www.nps.gov/grba/planyourvisit/camping-outside-of-the-park.htm
Primitive Camping Options: Hike, Drive, Horse; Some reservable
Park: Mesa Verde State: Colorado Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Morefield Campground (concession?)
Reserve: http://www.visitmesaverde.com/lodging-camping/morefield-campground/
Primitive Camping Options: Drive; Some reservable
Park: Canyonlands State: Utah Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: http://www.discovermoab.com/campgrounds_private.htm
Primitive Camping Options: Hike, Boat, Drive, Horse; non-reservable
Park: Great Sand Dunes State: Colorado Region: Intermountain
Links: National Park Service, NPS camping, Wikipedia, Weather
RV Camping in the Park: Other for amenities
Reserve: Campgrounds within 40 miles of Great Sand Dunes Visitor Center https://www.nps.gov/grsa/planyourvisit/area-campgrounds.htm
Primitive Camping Options: Hike, Drive, Horse; Some reservable
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