Welcome to iRV2.
There have been a lot of posts , on the pros and cons of the covers.
A number involve RV surface/decal damage due to cover movement in the wind. There are a number of members including myself who think that proper cleaning and waxing prior to storage, is better than covering.
If you do decide to cover , you would not want a cover that extends to the ground , any humidity that gets under the RV , would accumulate in or on the RV before it vents through the cover fabric.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.