I'm too old, the cover too heavy for me to be doing the dance putting on or carrying it up. Not to mention if there's much wind where you're storing the covered RV the cover may not last the season plus the flapping will be chaffing every where it's slapping against the sides. In most cases the cover does as much, if not more, damage than the weather will. Apply a good coat of wax, great all seals, check the roof caulking & should be just fine uncovered, then repeat all when you return.
But if determined to cover there's lots sources to find one, as to which is best is totally up to you & your wallet.
Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A