How good are they. If you got real good at flying them you could get close to a wave and ride it along just a few feet from it.
I've put my gopro on the kids kite before. Your very own google earth
The last job I was on they had a helium balloon shaped like a blimp with a camera on it to take aerial photos of the progression of the job. It was attached to a line and the operator just walked around taking photos. It made everyone make sure they were working hehehe

But I reckon one of the helicopters would be the best. How much are they?