Thanks. That sounds like a perfect thing for us. But I went to Cavetubing.com and it listed 3 Belize cavetubing links, and the cheapest was $264 for the 4 of us! I'm remembering why we 'did our own thing'.
I forgot to mention that we are spending a week in Orlando b4 the cruise, so will be trying to keep a lid on the shore trip costs. But I still appreciate knowing what's worth it and what's not. I remember on one cruise we actually walked to a great snorkeling site; another was just a $5 cab ride away. That doesn't mean all shore trips aren't worth the cost, but they gotta be exceptional. The tubing trip may be one of them.
Robb