We will be going on the Fantasy in October and trying to figure out what to do in Cozumel. It will be me, DH, DS6, DS8, and 2 grandparents. I have looked at both Chankanaab and Xcaret and can't figure out which would be best. Anyone done either of these? We would like to do a dolphin encounter, just the hug/kiss one. I like the look of the swimming in the cave in Xcaret, but really worried about the reviews of seasickness from the ferry ride there. Can anyone give me any advice on what would be better?