Our team has had good luck with
these.
Like most teams we typically don't like using the sticky pads since it limits your ability to move them around the robot so we usually use the adhesive pad to attach the GoPro to a small piece of lexan with holes so we can rivet or zip tie the camera where ever we want. We also found the plastic stand the camera comes in also makes for a good mount after you drill a few holes in the plastic. Go on Amazon and get a few extra mounting hardware pieces so you can move the camera into more angles and you're good to go.