Nothing wrong with the hunter cam cradle HD, I have used mine for an entire season with good succes and a heavier camera than the GL2................If you have the bucks this is about the best arm for the money:
http://skipenterprises.com/hunting_products.html#rocksteady_arm

If you are going to be self videoing this blog might be useful for you also:
http://www.pronghornproductions.net/tapingyourownhunts.htm