Last year when Brian, myself and Dan dove, the temps at 80ft (out by the tubes on the shallow side) were approx. 52 deg. There was a thermocline at around 35ft which went from 60 deg gradually down to the tubes (where it might have been a little colder...we didn't stay there long) 5 min. tops. There is a lot to see and do at gilboa at around 25 to 40 ft. where it will probably be warm enough for a wet-suit.
If we go the roll-over weekend, it probably won't be as crowded, but I don't think it will be all that crowded in December either. Last year, the wednesday before thanksgiving, we were the only people there, vis was great, and we got to see the big paddlefish (the only time I've ever seen them...and we've got pics to prove it...))
As for the date, we'll see what you guys think...though it is looking like DEC. for now
