if you have mask's that you are comfortable with do bring them, you will enjoy the dive more with a proper fitting mask...fins dont worry about..... most have them......
the sea will be the sea...one day big...next day small....opt for a breakfast dive first light......lots of undersea activity then...and normally calmer then later........and clearer..........dont schedule too far in advance, and DONT put a "downpayment in advance" you dont want to go out right after a storm.... bottom is stirred up for a day or two...dont worry the day you wish to go out, you will have many captains waiting for you...$$$
Have Fun....great thing about a morning snorkel....is the HUGE lunch you will want.....lol
Happy Thanksgiving