I purchased a top quality cover for our previous 32' Class A asap. I knew of fellow boaters who had trailered their boats with covers insufficiently tied down and had damaged the boats. I made sure our cover was securely attached. First time I took it off I noticed slight damage to the gelcoat on the top edge of the front of the coach. I took steps to insure that didn't happen again. In my area of So Cal, we often got pretty good afternoon breezes. I soon realized that there was no way I could totally prevent that cover from moving in the wind on something as big as our motorhome. But not before I had to repair minor damage to the gelcoat. I trashed the cover before it trashed the RV.