Went back in '93. Beautiful place. If you play any golf, I recommend squeezing in a round. Just rent clubs, you won't shoot well anyway. There is nothing like hitting a stray drive into the ocean, at least in Missouri.
There are no currency issues, just have plenty of small bills for tip money. Ones for little stuff and fives for an actual service. Kind of like a strip club. The better your tip, the better the service.
And you will get your fill of all things Conch and I got tired of all things Junkanoo. Maybe it's just me, but you'll see when you get there.
Have a nice trip.