Has anyone used Dive Mike, ScubaMex, Pelicano, Fat Cat or Raiatea for snorkle trips? These are most all on the Mapchick map. Snorkling will be a big part of our trip as we are from the gulf coast and visit the beach often. Anyone with experience to share on these outfits? We are also wondering if driving down into the Sian Ka'an biopreserve from the Tulum ruins would be worthwhile? We like to get off the beaten path and away from the commercial activities. Any experience with what to see and do in this area would be appreciated. I like my Mapchick map, but the focus of the Mayan Riviera map seems to be on hotels, condos and resturants. I wish it had more detail about what to see and do.