Ours stays in our driveway next to the house plugged into shore power during camping season. During winter, we rent a slot in a covered outdoor storage place...not enclosed, but at least a roof overhead to prevent snow buildup. She gets dusty, but that's washable. If she stayed in the driveway all the time, the roof gets so nasty from trees, it's almost impossible to clean. Did that the first season we owned her....won't do that again........
I have a nice cover someone gave us and have never used it, after I figured out what was involved in putting it on and taking it off every time I wanted to go camping. I guess they figured that out too and decided not to use it!