Welcome to iRV2.
I've never covered any of my 5 RVs, and 4 of them spent a lot of time covered in 2+ feet of snow , before I retired and started spending my winters in the south.
There have been numerous posts about the damage , due to loose covers scuffing the finish during wind storms.
JMHO: A good outside clean up and a coat of wax, are all you really need prior to storage.