The PH I hunted with in South Africa made shooting sticks from bamboo and tied them together with a 1 inch wide strip of rubber inner tube. I shot 5 of my 6 animals off of these sticks. They worked great. I made a couple sets when I got back and they work well too. I use them for groundhog hunting. I think the rubber would stick to the smooth fiberglass. Just wrap it around each stick a few times when you join them together. the gun rests well on it also. Take at least One wrap between each juncture to let the sticks form the tripod - or bipod if you prefer.
"Therefore go and make disciples of all nations,... "
Handgun hunter since 1979 - haven't used a rifle since!
HHI member #992, NRA, SCI.