We're headed back to the Western side on the Dream in October. When we went to Belize we booked our cave tubing excursion through this site Cave-Tubing.Com. They did a great job and were right at the docks waiting on us.
We did the X-rail adventure in Cozumel through these folks, Cozumel Tours, Activities and Excursions
, the tour was fun and dirty. The xrails are in decent shape, but they're a bit of a test to keep 'em straight if you're not paying attention. It wasn't just our xrail but after talking with a few others they too said the alignment and some breaks were a bit stiff. No accidents and no injuries, so that was a plus.
On the xrail you get to visit places where the "regular" cruiser doesn't get too. Which is nice. Take a little bit of USD and eat from one of the roadside carts for the local flavor...good food.
We still had time to get in a little shopping as well.
We're planning on going to the zoo in Belize through Carnival because the prices are nearly identical to others offering the same excursion. Costa Maya and Roatan we're scratching our heads as what to do. Mahogany Bay wasn't open the last time we were there. And Costa Maya was still recovering from a hurricane.