Quite different winters and weather but I have mixed feelings about covers. They have some very good aspects but can also have some very bad!
Wind and water and snow can have some really bad things sneak up on us. No cover and the snow and begin to melt just a bit and since it may not run off to dry, it can have more time to find those tiny leaks, where it goes in and really damages things.
A cover can do some good to cut that damage but in different ways it can lead us into letting even more damage happen. If we have a good tight cover that fully hides things, we are far less likely to go in the RV and look at what is happening!
Temperatures that change often and combined with less air flow can mean condensation? If you don't go in occasionally will you know when water is forming on windows and running down to damage the interior walls?
Does a nice tight fitting cover also tend to make you check things like the battery far less often? Or do you take the batteries inside in winter so that they don't run down or go dry? Both chassis and coach batteries have small drains still left on when we turn the battery disconnects to OFF!
Batteries almost need a full time companion to stay happy!
In this part of the world, sun is a big problem for RV, so we tried going all out and keeping the cover on but that did not work well for us.
It saved the decals from sun damage but we have so much constant wind that the cover rubbed to get holes in it as well as rub the paint off the top corners of the RV! We had a bat wing OTA antenna and found it was sticking out through the cover when we went to remove it!
Terrible thing to put on and take off and constant stress over what it was doing, so our last RV got no cover!
We have decided letting the RV fall apart is cheaper than me falling off the roof!