I’ve read the very many helpful threads on diving while on a cruise, and it seems like most of them are referring to making a fixed time for a boat excursion. I’ll be stopping at Cozumel, Grand Cayman, and Falmouth at the end of March with non diving family, and was considering snorkeling with a chance to dive on our own schedule, with the non water people hanging out in the shade at a bar. It seems that I could do something like this at the No Name Bar in Cozumel, Sunset House in Grand Cayman, and still looking for Falmouth. If the dive operation has rentals and a guide easily available when I’m there, I’ll dive. If not, I’ll snorkel. Reasonable or not worth the effort?