SkyDyno,
That's a good question. I know the GoPro will provide live video even while not recording but I don't know if there is a remote on/off for it, there probably is but I've never gone looking for that. You can try rcshutter.com or one of the other remote shutter release manufacturers, they might have something for GoPro. Post a link here pls. if you find something.
Regards,
Bart