Just walked around on our own. We weren't duty-free shopping, which is clearly the draw here, so we were a little underwhelmed. We did tour some historic homes & Blackbeard's castle, which was interesting & worth the price of admission. The Fat Turtle, in the yacht complex right next to the boat, is a decent place to grab a beer & a snack before getting back on board.
Spent the day (or half day, really) at the St. Kitts Marriott Beach Resort enjoying their lovely beach & pool ($35 pp for a resort pass, which includes the beach, pool, access to restaurants, & a towel). The pool complex was large, with plenty of chairs (& shade!) for everyone. The taxi was $12 each way from the port & back for the two of us. We had a very nice, relaxing time here.
Great island! Went on an island tour, which included stops at the Emerald Pool, Trafalgar Falls, a geothermal hot spot & an overlook which offered great views of Roseau & the ship. Had lunch at the Cocorica Cafe in Roseau, which was a good value. Make sure & try Kubuli, the local beer!
We learned very quickly the differences between St. Maarten & St. Martin! Our taxi driver who took us on a tour was Dutch & clearly had a bias against the French side. Spent about 30 minutes walking around Marigot on the French side & enjoyed it. Picked up some maccaroons & got yelled at by a French woman to make our trip complete.
Our visit to the Dutch side was cut short, because it was pouring rain. Really wanted to see Maho beach (where the planes land), but couldn't because of the rain.
After our tour, we had lunch at the Firehouse (on the Boardwalk), which was good - make sure & stop by there if you're a First Responder from the States! Then we strolled down to Pirates in Paradise, a pirate/Ohio State themed bar also on the Boardwalk. They had free wifi & cheap drink prices, so we waited out the rain there.
If you don't want to spend money on the water taxi, the walk back to the boat is not as bad as it seems - even in the rain!