@RedBurn: Coastal Crew has used a DSLR with a 15mm on it in the past (like Arrival) I believe, could be that again, definitely looks better quality than any POV camera.
@Pastafarion: 3 axis gimbals, they make ones that can mount to GoPro mounts on a helmet or chest cam. Just google "3 axis GoPro gimbal" and a bunch will come up for a couple hundred bucks each.
It is something like this: www.ebay.com.au/itm/Feiyu-Tech-FY-WG-3-Axis-Wearable-Gimbal-Steady-Stabilizer-fur-Gopro-4-3-3-TV055-/281995318045?hash=item41a83b131d:g:iIcAAOSwiylXBeIx