Hi There,
I am heading to Blackeards on March 25th for my 6th time . Each as been in March and April. I have always worn a Polartec fleece lined full nylan piece with a shorty over that. I tend to not get cold, but there have been times, say about day 3 after the 3rd dive of the day where I decided to not do the cooler evenings night dive due to not wanting to get chilled by putting on that wet suit again. (I think a hot chocolate with rum under the full moon was the alternative, so not compaining about my decision.) So think multiday diving, steady breezes , a great dive trip that will supply you with a lifetime of diving memories.... and bring that extra wetsuit. You can rent one from them, but I always like to really put myself in the banks pocket by buying one new nice piece of equipment before I go on a B.B. trip. ( this year it's a new updated prescription bifocal mask). Maybe for you there's a good discount deal on the web for a new cozy polartec fleece under layer skin. It also makes it so much easier to pull your wetsuit over your skin. I'd do it , stay warm, and what the hell if you only wear it once to stay warm enough to do one more dive at the end of the day then it has more then earned it's price. Just my 2 cents, have a great trip! Steve from Maine