Best snorkeling?

I need help figure out what to do in port. We've done cave tubing and would like to snorkel this time. I read about rendezvous caye and it sounds nice but there are so many others and I feel overwhelmed trying to make a decision. The most important thing to me is great snorkeling with a large amount of live coral. Any suggestions would be greatly appreciated.

the best will be out on the atolls but you would need to rent a plane to squeeze it in.