a camera arm is just another toy to have.

I'd spend the money on something that will help you take care of your camera like a clear filter for your lens, a good waterproof camera cover, better tripod & head, wide angle or lens doubler.

Dependency on a camera arm is superfluous in my opinion. Of course that's IF you're shooting video for another hunter. If you're alone then sure, you've got to use something but there are some out there that are just ridiculously overpriced. ( I won't mention any names)