We had a great trip!!!
We found a really nice camp ground on Lake Somerville, about 2 hours drive north of Houston. No gators, no snakes, and no sharks. Nice campsites right on the water so we can beach the ski, and camp right next to it. Wind was bad due to an oncoming cold front, but I took the ski out for about an hour and jumped waves, popped wheelies, and submarined it a couple times just for fun...
On the way there, I put the cover on and just to be safe I bungeed it down. I put a bungee across the middle and under the trailer, put a ratcheted strap across the back and through the steel loop, and then pulled the bungees in the front out tight, tied a loop in each side, and put a small hooked bungee through it and under the winch.
So it wasn't going to go anywhere!
Besides that, it did what I thought it would do and sucked a vacuum on the cover and it held itself down tight to the body of the ski.
I agree that it will keep the bugs and road grime off the ski, as well as minimize sun damage, so I will keep it on from now on.