bailey15- that sounds like a good price- but keep watching the prices and if they go down you can get the difference refunded.
You have picked a very nice itinerary, some lovely places to visit. Be sure to be up on deck as you sail into San Juan- it's a lovely sight, like sailing into a set from 'Pirates of the Caribbean' when you first see El Morro the fort at the entrance to San Juan. The old town is quaint, full of cobbled streets, little courtyards and shopping! Take a walking tour of the fort and downtown.
St Thomas- is known for good jewelry shopping, there are dozens of shops downtown, if that's your thing. You could take a ride up to
http://paradisepointtramway.com/ for a look out over the Caribbean. Good photo opportunities!
Or a bus tour, up over Paradise point to Magen's bay- there are so many swim/snorkeling/sailing excursions available- it depends where your interests are.
St Maartens- we usually do some downtown shopping in Philipsburg- you catch a water taxi from the pier over to downtown area for about $4 each and then after shopping we head to Orient Beach- a taxi anywhere on the island is about $6 per person, nothing is very far away. Or you can taxi over to Marigot on the French side for some more upscale shopping.
Again, check out the excursions offered and see what appeals. All your port days are Caribbean islands so beach/watersports/snorkeling,sailing and of course Shop til you drop.
Be sure and read your daily program of events- Carnival Capers is delivered to your cabin each night and it lists all the next day's activities. There are so many things to do onboard that you'll be glad of your days at sea to catch up with what's going on.
There's nothing better than sitting up on deck watching the turquoise Caribbean going by, waiters bring ing you drinks....mmm unless it's sitting up on deck late at night, way out in the ocean, just watching the stars!!
Enjoy.