Covers are a major hassle to put on and take off especially if your doing it by yourself. Everyone I know that covers their RVs complain about wear marks left by the cover.
I have never covered mine, I just keep it waxed, and it almost looks new.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee,with Hemi, hooked up with a Blue Ox Aventa LX, and Brake Buddy.