We have a '05 27RSDS and this winter we are forced to leave it outside. Living in S.E. South Dakota the winters can be rough. I'm looking at ADCO covers in my RV catalog and I need to hear from someone who has used one. I'm afraid if it's like a Bra on a car it will do more damage than good. Do they scratch in the wind? The ad says they let moisture escape to prevent mold. I'd like some advice from experience b ecause they're about $300. Thanks, MeatMan