I did visit Tulum in Mexico in the end of June. I was traveling from Tulum in Mexico to Caye Caulker in Belize.
Here is a travel report with pictures. I don´t recommend doing this in the same way I did during high season.
Have your bookings arranged before going. http://swebackpacker.com/2014/09/06/is-tulum-to-caye-caulker-in-one-day-possible/
