December 5th is pretty far off (over 9 months), and there’s a lot of diving to do before that. I think 4 of the 6 spots are now filled, possibly 5, but it may be possible to arrange another boat so let me know if you are interested and I’ll see what I can do.
For the more motivated among us, I am making arrangements to do some additional beach diving. One site is at/near the Captain Cook Monument and the Kealakekekua Bay Marine Sanctuary. It’s near by and there’s a decent chance of seeing dolphins there.