Much depends on the region you are going to. Check with the local wildlife conservation authorities, park personnel. Jasper Park provides bear proof storage at all their sites, I think. Willmore wilderness provides nothing. Outfitter camps may or may not have a high bar for hanging food(or game) OTOH Willmore is entirely random camping, and has very low use rates. (I've done several trips without seeing a footprint once off the main access trail.)
I've been backpacking and canoeing for 35 years, averaging about 3-4 weeks a year in the bush. I've never bothered to even hang my food.
But: I don't use the national parks. I don't use campgrounds. My usual backpacking haunts are Willmore Wilderness, north of Jasper Park, and the Rocky Clearwater Recreational Area, east of Jasper Park. Both are hunted. Bears have enough respect for people that they keep out of our way.
On canoe trips I have had bear issues twice. Once on the Churchill we had one that wasn't afraid of people in the slightest. After trying to chase him off several times in the first half hour after landing, we packed up our camp and moved to the other side of the lake.
On the Mujatik, we had a bear saunter into camp after supper. That night we kept the fire going and someone up. That trip was the opposite. The bears are unaccustomed to seeing people at all, and are just curious, but haven't learned about the possibility of treats, or of rifles.
The Churchill, as canoe routes go is fairly popular. There are fire rings at most portage landings, and on many windswept points. (If you have experience the bugs there, you will know why windswept points are popular.) The Mujatik and most of the other trips I've done were much less traveled, frequently requiring as long to clear the moose trail as to portage the obstacle. (Once we found camp litter: A tobacco tin with a 1922 revenue stamp.)
I have had mice nibble the corner of a package of granola or oatmeal. Just rebag it as it happens.
I spent a summer on staff at Philmont Scout Ranch. At that time they had 12,000 scouts a summer. A group was 10 scouts. They would be there for 12 days total, but first day was orientation at base camp, and last day was turn in rental gear, and get cleaned up. So 10 days in country. So at any given time there were about 1500 campers spread out over the 25 x 50 mile ranch. Bear country was about 2/3 of that. The remainder open desert.
Bears were a constant problem. And the bears got clever.
There was one bear, the Pop Tart bear that would take carelessly hung bear bags, and rummage through them for the blueberry pop tarts that were part of one of the breakfasts. Everything else would be left alone, only incidentally damaged.
There was a young bear, the Kamikaze bear, that would climb one of the trees until he was well above the bag, leap out from the tree, grab the bag, and ride it down. The cord had enough stretch that he was only a few feet off the ground moving slowly when it broke.
Another bear was brazen enough to watch the campers hang their bag, and in the evening would come over, look at the bag, follow the cord to where it was tied off on a tree, and break the cord with his claw.
The ranch had two live traps, and working with Department of Natural Resources (DNR) would relocate the chronic offenders.
Curiously, the bears left our cabin alone.