Shop around for a TA that will give you some OBC
Sail on the Wind Surf out of St. Maarten. Your first cruise on Windstar in the Caribbean should be with sails.
Book a Star Collector cruise, you will get the laundry package for free. You will only need one suit case and you will come home with no laundry to do.
Fly in a day early and stay at the Holland House with a room facing the bay. Wake up early and see the Wind Surf sail in. Take the water taxi from the Holland House to the ship. You can walk to the ship from the Holland House, but the water taxi over is fun.
I think there are still some cabins available on the 12/27/22 18 day sailing on the Surf. Spend New Years at sea