I use one of these on the roll bar above the passengers head ( I cant remember offhand which size ) with a bolt onto the normal gopro mount
http://www.ebay.co.uk/itm/Marine-Grade-316-Stainless-Steel-P-Clip-Hose-Pipe-Clamp-Cable-Mikalor-Type-Lined-/190900783836?var=&hash=item2c7292cadc:m:mmXEqtx543rMPWv_S7mEBiQ
I dont trust suction cups etc, camera is too expensive !
Thanks - good idea. The GoPro plastic rollbar mount needs an extension to make the camera see forward and would be a difficult fit on top of the large rollhoop due to the headrest being in the way - but that clamp looks ideal.
Also saw this:
http://www.ebay.co.uk/itm/DogCam-Small-Roll-Bar-Mount-for-HD-cameras-/400295051174