Are you going off to winter camp? or just looking for things because you are considering?
If you are just going to go the once? Take a motel/hotel or cabin, if there is one close to hand. Doing the camping thing in your A will likely not a be great time. It takes a number of winter camping trips to begin to 'get it'. And please..don't get me wrong...those that do it often, love it. But there are issues you have to work thru that kind of take the fun out of a weekend or week long time.
But..okay..if you insist? you need power. Lots of it for your heater(s) and furnace, lights, fridge and TV. A generator would work but it needs to be a biggie. Those heaters really eat up the juice. And a dehumidifier. After a couple days of being in the Rv, you won't be able to get warm, no matter what you do. That is the moisture that gets into everything. You would be shocked to learn how much water one body gives off, just living..never mind all the wet clothing drying and food cooking and hot water in use.
And one of things you need to do is counter-intuitive..like having two windows open. One in rear one up front...the air needs to move thru the RV..it drags the moisture laden air out.
Winter camping is a blast...but...so is a nice warm cabin or hotel/motel.
Gary Haupt