You can get away with a google (heh) strap for the camera.
Not sure about the camera you are thinking of getting, but if it doesn't have a video playback and wide angle lens, I wouldn't bother with it. Time and time again I have friends that think they are saving money with a cheaper helmet cam and end up hardly being able to use it. The VIO POV models are by far the best I have seen. About the only drawback is the cable to the controller. It's not bad but there were some problems with the connection last year. My understanding is that they have fixed the problem with this years camera. Yes they cost aroud $600, but your money will be worth it. Or you can throw away $280 on something that will hardly be usuable.