Fantastic view angle from a kite to shoot windsurfers...
Okay, that is very cool.
It got me wonderin'; assuming you didn't care about the extra drag, could you potentially tow a very small go-pro carrying kite (lifting ~80gms) tethered say three metres from the back of your harness? My immediate problem with this idea is apparent wind could power it until you turn or stacks, and then it's highly likely to splash down (maybe helium?). Also the changing conditions would affect the trim on the kite and it might not be possible to always be pointing the camera at the rider. The foil would need to be be such that it always oriented towards the anchor point. Anyway, just daydreaming...