Having had several Class Cs and As and being one to camp in any weather, our experience is Class Cs are more of a challenge in cold weather. Biggest problem is that they carry less water. When it's REALLY cold, you will be dependant on what you carry with you. In winter finding a campground that has not turned off their water is dicey. With our Class A, if we are really frugal, we can go 3 days before needing a fill up. Our Class Cs would only last us a day. Keeping warm was never a problem. We used one 'oil filled radiator' electric heater in the Cs, 2 in the As and had the furnace as backup. This does assume you can find an open campground. Don't think we'd even try without having someplace with electricity. Remember, you HAVE to keep the RV heated at all times when it's freezing out to avoid plumbing damage.