Could you rig up a way to attach a regular camera tripod? However, if you flip, the whole shootin match would probably be toast no matter what. Hadn't thought about the impalement issue ????? I did see a guy on the Main Salmon a few years ago who had a "real" movie camera mounted on the front of his boat, with a long cable release. They were making a promotional movie, and ran the left hand line on Salmon Falls. The guy with the camera mount popped a pretty cool wheelie. It appeared that he hit the cable release to start filming, then stuck the cable in his mouth so he wouldn't lose it, so he could stop filming once he was through the rapid. But that was a much bigger camera.
What helmet cam do you use? I've been thinking about getting one.