Dan:
The rule at Cap Cana (if I remember correctly), is that all sand is "through the green" unless it is "surrounded by grass." So, the island green isn't a bunker. In fact, most of the sand there isn't considered "bunker."
I've played it twice. I liked it, but not as much as the Teeth. I confess to being prejudiced, however.
I also played P.B.'s L'Estancia. Some very cool holes, and, all in all, a very enjoyable track.