2012 Skeeter WX1850. Always towed with cover on. I literally only fish in the winter. My first trip was a 3 1/3 hr drive at 15 degrees f. 75 mph down the interstate. When I arrived at the cabin and untarped my boat, I about wanted to puke.. The gel coat on the upper sides looked like someone had sanded it with 1500 grit. White residue and a dulling of the gel coat. The inner surface of the cover, under those temps was brittle/hard enough that the flexing of the tarp chafed the gel. Nothing serious, but definitely heartbreaking on a new boat. I brought the cover to an upholstery shop and had them sew a soft liner. Problem solved
Skeeter/Yamaha shipped my boat with a wedge, and recommended its use, thats good enough for me.
I built a boat bra that hangs on the trailer myself. Had the same upholstery shop put the screens on it. I like the boat bra because if you tow with several different vehicles, the protection stays with the boat. I wouldve needed 3 different rock brushes between the ride heights of my tow vehicles. F150, F250, and Yukon Denali XL.