If I was doing a DIY fishing trip to Mexico, I would go to the Xcalac area near Belize border rather than near Tulum. It's at the other end of the Sian Kaan Reserve. Would likely need a boat or inflatable kayak there also. Better yet, I'd just go to Belize. Been there several times on DIY trips and have had good success. Going back for 4th time this spring.