No GoPro cameras on my boat. I like them, but they don't play well with my Mac. Sony cameras do though, and I have a few. I filmed two episodes of a kayak fishing show that will air on Versus (NBC Sports now), and WFN this past fall. The videographer/producer put GoPro's on different parts of my kayak for alternate angles. Mine can't get wet. I wish I had one that could. Filming in the rain is tough. I keep it in a dry bag and pull it out when someone is hooked up.
The camera mounts are all made by Yakattack. I did the whole "make it myself" thing for a while, and after getting the Yakattack stuff, I wish I had it before I filmed 5 DVDs worth of footage. Still working on the Winter River Smallmouth DVD. Going tomorrow in the cataraft.