I do not tow with cover no matter. There are gonna be some spots where the cover vibrates or flaps and it'll do a number on the gel coat. One thing to do is to always have one of those big rolls of saran wrap from Costco in the truck. In a pinch, if you see there's severe weather coming and rain. put saran wrap around all the places of contact and then cover over it. I know it sounds silly but it works. I've heard other boaters recommend that and was kicking myself on sunday as I encountered heavy rain for 30 mins on way home, decided would just let it air dry in the garage rather than throw cover on. And I had been thinking about throwing the roll of Saran wrap in the truck for a while, for JIC, but forgot.