Rent scooters, but don't rent scooters, but seriously rent them Best way to get around the islands. Roatan goes on forever and has some great little beaches on the north side of the island (but watch the gravel roads, ). Caymen, go to 7 mile beach if you just wanna relax and swim/snorkel. Belize, don't get off the boat unless you booked an excursion ahead of time. Cozumel, hit the bars, Carlos & Charley's, Margaritaville etc. rent a car or scooter there to get to the money beaches on the other side of the island that no one ever gets to. They are amazing and bare, hardly anyone else there. We didn't really do any excursions, we made our own wouldn't have done it any other way.