We always bring our masks and snorkels, but never fins. Vincent has a selection of very used, but serviceable fins on board. We like the snorkeling around Xtabi and make a point of snorkeling there at least once each reach. No need for fins there unless you want to snorkel around the point to the South. We do the jump off the cliff with our gear and that makes for a fun way to start your snorkel! Just be sure to buy a drink or two!