Could you post a pic of your set-up? I've tried the tree-arm thing too,and it works ok for black bears on bait,but like you said it's a pain for everything else. This sounds like a cool set-up I'd like to give it a try if I can make it work.
I did a write up on my setup on my blog. It's called a Bowfinger 2.0, and you can use it for any camera. I just prefer a Gopro because it's so small.
http://www.consummatesportsman.com/2012/08/bow-camera-mount-bowfinger-20.html
