We've had posts mention Nachi Cocum before, so no worries! As long as you are among the lucky 100 you are safe.
Another option to consider is Passion Island
, which you can go to on either a catamaran or a wild ride aboard a twister jet boat. We went there a few years ago and we had the entire place and just ~60 guests. It was very nice. It is all-inclusive at the time, but now has a cash bar.