I was thinking the blimp could be tethered for the start, or towed behind a jetski or something. The PTZ could be used to adjust the camera while in motion.

Is the camera on the helo PTZ or fixed? Might make flying and aiming a problem...

Is the helo going to follow the fleet or just be around start/finish areas?

Are the competitors wearing helmet/eyewear to protect against kamakazi helos?