Amigos del Mar lets me dive my air for the most part. They still have a schedule to keep though. If cost is no question, getting an op to rent you dedicated boat, captain and dm should take care of that.
The wind has been howling in Belize for almost two months. Some days local boats weren't going out due to small craft warnings. Amigos big day trip boats still went out most everyday. These require you to be at the dock very early in the morning. Travel time is a bit long but you get continental breakfast on board, nice lunch, 3 excellent dives and a couple of fruitpunch drinks on the way back to shore (should you be so inclined).
My wish for you, is that the wind will have abated somewhat before your arrival. Don't want it completely gone because it is very nice to have a breeze to keep the skeeters down and so too the overall heat. Lovely to have a little breeze to help cool a person down a bit.