One distinct advantage I have is my storage is in the equipment building and it's heated in the winter so I never winterize the camper. In the winter, I use it for a 'break room' with hot coffee on the stove.
It's outside right now, warm enough here that there is no worry about freezing. As an afterthought I did check the batteries this evening. I had forgotten to check the water this winter and they were right up there. My converter must be doing ok. It stays shore powered all the time.
My opinion about keeping it inside during the winter is, it will last a lot longer not being out in the weather. Might be all wet on that, not sure.
