Andy,

Kinda after the fact but if you feel the sched 40 is to flimsy, you can get sched 80 at plumbing supply houses. Excellent point made above about not glueing any of it in case you need to do a repair. I was just looking through Cabelas for camo netting for the same reason as you. Looks like there are a number of options now that have burlap as a base for those with light colored boats. You could weave in some of the flappy kind on the outside and have a great cover. If I recall, you just painted your boat green so probably not an issue for you.

Good luck

Steve