I relate it to what happened to my nice shiny red sports car years ago that I put an expensive well fitting front bra on to protect the paint...
after a few months I took it off to detail the car and the ever so slight movement of the cover had scuffed the paint enough to where I could
never take the cover off unless I got the car repainted
granted your rv cover probably won't be in winds as fast as that cover was subjected to
but I'll also bet it won't FIT as well and will have more movement in any wind ...
My solution? I found a covered storage spot for $55/mth !