We have 2 children ages 3 and 5 and we are not going on any excursions when we go to Cozumel in march on a 4 night cruise out of galveston. We took them last year and got off the boat (non DCL) and looked around and got back on the boat and enjoyed it not being crowded. We were thinking of doing the same thing on our DCL cruise. Is there enough to do on port days? Are we missing out on excursions? With a 3 yo, it seems our choices are limited anyway.