Hey Dave. As you know, my wife and I are on the same cruise. We are thinking about the Dune Buggy excursion on Grand Turk, and maybe one other one somewhere else. I will be interested in hearing what you decide on.
I am certified as well, but I wouldn't feel safe on one of those dives since it has been over 15 years since my last dive.
I have heard mixed reviews about the Screaming Eagle jet boat.
We will probably explore on our own as well.