a gl2 on a gorilla will sag. it gets to the point its sits so off balance. gorilla is best for s small cam corder. use that set up on top pointing at your shot or a top view of the hunter/ gl2 on a muddy wit the fluid head for the impact shot.[up]
I'll cast another vote for the GoMuddy arm.
If you like the LoneWolf design, I can put you in contact with someone who make a simular arm but in a heavier model.
As for a fluid head I recommend a Bogen/Manfrotto 3130 or 128rc for being smooth and somewhat affordable.
Parker I used the Lonewolf this season but am filming with a smaller Sony. No fluid head but most of my hunts are self filmed so not as much an issue for me. Set up becomes second nature, pull bow or gun up, set up arm, put cam on, set zoom, hunt. I prefer the pull strap to a rathcet strap unless you are leaving the arm in the tree. Loewolf a bit sturdier then the Gorilla, but not as beefy as the two GG shows.