I would highly recommend Sting Ray Sailing. Gorgeous 40' catamaran , we were one of only 2 families that day. they actually monitor
disney cruise port days and times so that you'll never be rushed for time. highly recommend ! we went to sting ray city then a really great reef for very good snorkeling . Very knowledgeable crew and captain. i wrote a review on trip advisor , if i can find it, I'll post it good luck! p.s. Cayman Eco Adventures is their sister company but they use a "fast boat " brand new, very luxurious.