Spin pole is always a nice shot, but you'll need a 'roll bar' mount as gopro calls them. I've mounted to the boom many times, it's pretty steady once you're going. I'd like to do an extension off of the spin pole or back of the boom but am not sure what/how to mount it.

I always tie the camera off to something substantial, but I've gone through two already. I have a foam float that's glued to the back door of my new one. Every time I lose one GoPro comes out with another one, I'm up to the Hero 3 now!