We just returned from a week in Akumal(where we got engaged! : ) We chartered a catamaran from Akumal for the day and it was amazing. It fits up to 19 people. We paid 1000 for 9 people and left the bay @ 9:30 am and returned around 4pm. They sailed us out to a beautiful secluded beach where they prepared us lunch. We got to hang around on the beach and play in the water for a couple hours and then they sailed us to a private lagoon location where we went snorkeling - it was awesome!! They provided all of the pop,beer,water, and tequila. The guys got to fish off the back of the boat as we sailed. Didn't catch anything - but had fun trying. The place we charted out of was called Akumal Dive Shop. It would be the only place like that in Akumal. Akumal is about a 30 minute drive from Playa Del Carmen. Check it out - you will love it!