Because I deal with New England Winters I will use the Rv covers. I figure if the cover helps deflect moisture it may have a benefit, also noticed the covers help keep the exterior cleaner but that's just my 2 cents. Cover is on Nov to April after that cover is off and in storage, not sure if I would want a cover on in the sumertime humidity.
I live on top of a hill with a open field across from me along with my open property. I deal with lots of wind related problems with the covers, usually ripping on the Rv corners where the rain gutters are. I'm on my 3rd cover with my present Jayco, Camping World cover lasted 2 winters, now I'm back to Adco
Mike