Are you sure you've got your dates right? We're on Enchanted on the 27th for a 10 night, and it looks like another 10 night goes before that....
Anyway, a couple of the ports on the 27th itinerary are, as of now, only allowing ship excursions. I'm hopeful that will change by next February. You may want to browse the above-linked boards, as folks have been reporting their experiences. As for currency, you should only have to convert to US$, as most Caribbean ports are happy to take that.