The 3M mounts which are industrial strength VHB double sided tape worked very well for me.
I had one mount on the side of my helmet, another mount on the toe side between the binding like you described. It never came off and I had to slice it out with a blade to take the mount off when I sold the board. I also had one on the nose end of the board but only used it once because the camera easily gets sprayed by snow.
My advise is to figure out where to mount it first before you use epoxy.
here's a sample of the camera mounted between the bindings.
I'm not too worried about impact damage, although I did tie a shoe lace between the base and my binding in case it did break away from the board it won't go too far.