Yucatan marinas and ancorage
Isla Mujeres is an excellent hurricane hole. Check it out. It''s like the island was designed with that in mind; a narrow channel leads to a large totally protected inlet. My boat was there this summer when a huge one passed between there and Cuba and the island was evacuated. Still floating. You can also anchor out right near the airport on Mujeres, very convenient spot to access the town.
Mujeres has a few marinas, and the private docks back in the lagoon will be even cheaper, but buggy. There are great tacos in a shop behind teh softball fields; they don''t open until 9pm but it''s worth getting away from the tourist end of the island.
I''ve heard you can get inside the reef at Tulum, where you''ll find some ruins. I haven''t been there myself yet. Next month.
From Cancun, you can take a bus or rent a car and visit Chichen Itsa, which is a phenomenal ruins site.