Your number one concern when winter backpacking is breaking out into a sweat while hiking, getting your clothes wet, and then getting hypothermia after you stop for the day, but at temperatures of -30°C you're also concerned with frostbite.
Layering is key, you must know how to properly layer your clothes so that you can regulate moisture, NEVER let yourself break out into a sweat, because if you get your clothes wet you will catch a chill when you stop.
One of my favourite things about winter backpacking is you don't even need to carry your backpack. You can just bring a pulka (sled designed for winter travel over snow) and drag your gear behind you:
Pulkas are super nice, because you need to carry more with you in the winter than in the summer, like extra clothing layers, heavier boots, a warmer sleeping system, snowshoes/skis, hot water bottle... And you can easily carry twice as much as normal with a pulka. Pulkas are also preferable in deep snow, because having a bag on your back makes you heavier and sink more with each step.
My next favourite part about winter camp is that you don't need to bring a tent if you know how to make a good snow shelter, and my third favourite thing is doing dishes, because you can just scour out the inside of your bowl or mug with snow and it gets it sparkly clean in seconds, it's super convenient.
As long as you know how to survive in the cold (assuming you know how to do being from Michigan), then you should be ok, but perhaps spend a night with your buddies in your back yard before embarking out into the wilderness, you can get your sleep system worked out with a warm place you can retreat to if needed.