NRH,

About an hour south of Cancun is Tulum, a small town (way cooler than Cancun) at the road that leads out the long peninsula on the Bay of Acenscion. There is good flyfishing for bonefish and permit and other flats species. I can't recall the names of the places or lodges out there offhand, but it wouldn't be hard to look up. There is limited access for DIY, but it's possible especially if you can bring even a small inflatable.

Sincerely,

Salmo g.