It is Grand Cayman.
On a recent cruise (February) a bunch of us chartered a boat from Captain Marvin. It worked out to about $35/person.
We were picked up at the pier in a bus and proceeded semi-directly (a stop at a liquor store for sodas, snacks, and other items) to Marve's place. For those without their own snorkel equipment, Marve provided.
Because it was a group cruise, everything was arranged ahead of time.
What was nice is that we were "alone" at each snorkel/swim stop with other day boats following us.
Watch out for those stingrays. They have a nasty habit of "clipping". As in football.
And have fun !!! Everyone should do it once.
Happy sails !
pamda