I was under the impression that he wanted to track the bikers. Perhaps wrong, I don't know, but the OP will have to clarify what he really wants to do here. Obviously, what you suggest is the way to go, using "virtual reality" goggles to control where the plane flys.

Having the camera on gimbals or a swivel of some sort, servo controlled for pan and tilt, would also work, but adds weight for servo, mount, and batteries. Then tracking the movement on the ground with a moving aircraft will require coordination. Again, not easy. Do-able, I guess, but not easy.

Your video would be nice to see. Looking forward to seeing it.

CGr.