@pgmoore I using my Hero 4 Black Edition, at 1080, 120 fps - wide. I ski from 14m down, and works great!. I hook up the wifi remote and strap the wifi remote to the steering wheel so that the driver can just click record for the passes and so that you don't land up with hours of footage but rather individual passes.
Check out my youtube channel for more cool gopro photo's and videos!
www.youtube.com/skitrav
Instagram: skitrav
Hope this helps!