we pre booked a beach party at Cozemel through Shoretripps.com that includes food and drinks.Been there one time before, it was pretty good.
Grand cayman we booked through the Carniavl excursions, a trip to stingray sandbar,Hell, and turtle farm. The price they quote is what we paid per person.
We have not been to adventurist on our own, usually do the excursions and head back to the port. I like to party close to the ship, I've seen to many people running to get back at the last mimute. The boat won't wait to long if your not onboard.We saw a couple of guys in Cozemel running to get to thier ship as it was pulling out, don't know if they made it or not. Another time we watched two girls brought out to our ship as we were leaving and they had to climb a rope ladder to get onto the ship. I'd rather be on watching than climbing if you know what I mean.