mathew said..
Two cameras. Seriously. One on each side of the boom, either at the tail or at the head.
Harness mount - it sticks out backwards at 60 degress (from horizontal), can use a go-pro but IMHO a 360 cam is better.
Mast mount pointing towards the nose of the board - Ben Proffitt uses this a lot.
Firstly will the harness mount work with a non 360 camera and which one do you use.