It would be pretty cool to send an underwater drone down there, with power/video line to the surface, so it would be pretty lightweight and enough illumination to see in the water.
I’ve been thinking about a Gladius “Chasing Dory” for a while as they are comparatively reasonably priced. But even at a few hundred bucks I don’t think I’d want to risk it in there!
I kinda doubt you'd get any useful control with those currents. Might as well just drop a camera in there on a rope or a stick (which has already been done).