We swam with the manatees at Chankanaab in June. The ship changes its time to match Cozumel time. There are no troubles there. I believe we did the 2:00 time slot. It is a 30 minute swim. For some reason, we were the only ones scheduled for that time, so it was just DH, DS, and myself. We had an incredible time. We got there a little early, and DS swam in the pool there. We have done the sea lion swim there as well on a different cruise. We booked through the website and told them we were staying locally as you cannot book through them directly if you tell them you are cruising with DCL. I highly recommend the experience. They do take a lot of pictures. The cost of the CD depends on the number of people in your group. The CD will be charged to your credit card in pesos if you do not pay cash (FYI - Your credit card company may hit you with a fee for converting the currency). Our DS was 8 at the time, and it was the highlight of his cruise. Getting a taxi is easy both there and back. The suggestion is to arrive 30 minutes prior, but we have had people get there later and still participate. We returned back to the ship in plenty of time. We chose the later swim because DH and I wanted to go a few places before we headed over.