Again, I agree with Robin, for water temps like those of the Blue Hole (~62 degrees). When the outside temp is really warm, you have to partially remove your dry suit to be comfortable during surface intervals. On the other hand, no matter how warm it is outside (ambient), if the water temp is below 45-50 degrees, you'll probably want a dry suit. And I can't imagine ice diving (one the things mentioned in the OP) in a wet suit - although I'm sure some have. I'll bet they didn't do subsequent dives the same day though.
I really think that Blue Hole (and Rock Lake and surrounding heated holes) is different than Colorado Alpine diving, although some can be during certain parts of the year. In a perfect world, you'd have both.
I really think that Blue Hole (and Rock Lake and surrounding heated holes) is different than Colorado Alpine diving, although some can be during certain parts of the year. In a perfect world, you'd have both.