Dutchman nailed it 100%.
To add about the cover, if you plan on keeping the camper for the long haul, a cover is good $ spent. The one winter I stored outside, I had a soft cover on the camper.
The issue I had was, snow removal was difficult off the roof due to the cover taking the shape of all the roof appurtenances and the water running off during freeze thaw cycles created large icecicles that clung to the cover fabric and in some cases tore the cover.
Mid winter, had a snow meltdown and at that point I put a plastic tarp over the soft cover.
This helped immensely as the snow came off the roof easier and more completely and that minimized the icecicles.
I'd reccomend full soft cover with tarp over it, at least over the roof.