Here is a cheap easy way to help shed water off your boat cover in the rainy season. I took 3/4 PVC tee's and used a sander to remove material (at and angle, see picture) so the top of the tee could snap onto the hand rail inside the boat. Be sure to cut them so the pipe will bow up to the cover and not down or straight across. I made 4 of them. Then I proceeded to cut a piece of 3/4 PVC pipe to correct length for my beam so it would bow up into the cover. It has worked great! Give it a try. It stores so easy and is light and quick to do.
I like that idea. I have a simalar one. I have 1" PVC that has a vertical pole in the back and next to the driver seat with Ts on the bottom. The front and back are connected about 42 inches off the floor and over the motorbox if you can imagine. I dont have a pic but I think you get the point. They are only glued in straight sections so i can disassemble it and store it in the ski locker. Works mint.
No snap in polls. I only need to use these poles from November til April maybe May. It does not get that hot under my cover. No warping issue. They can get brittle thought. But the pipe is cheap. I would love a cover that you just pull tight, but my was not made the well I guess. My cover doesn't see days hotter than 80 when I use them. I am in SJ California by the way.