I have used a GoPro on my Goldwing trike for many years. Was really great filming my old stomping grounds in Oregon's Columbia River Gorge and roads in the Yukon Terrority. Have also used it in the Atlantic Ocean on coastal kayak adventures.
I had it mounted outside of the trike's windshield with a "shoe." Did it this way because there wasn't enough room to mount behind the windshield. For the kayak, I used the suction mount to mount it on the front deck.
You just brought to the forefront what I've been thinking of doing. That being said it will be easy for me to use in the Vegas since I already have all the necessary accessories:
Option A: Mount a "shoe" above the speedometer and slide the camera into the plastic "shoe".
Option B: Mount a suction-based camera holder with plastic box holding the camera on the dash above the radio.
Attachments are photos of Options A and B.
In either case I'll use a long USB cable to power the GoPro from the USB ports under the radio. If you have a remote (bluetooth) you can use camera at will.
YNCM USN-Retired (64-90)
RVN (Tet 68)
2015 Thor Vegas 24.1