It's night 2. They do have some limited pirate accessories, and you'll get a pirate bandana in your room (each person). Be aware they are just 1/2 a bandana (triangle shaped) and fairly small.
What are you going to do with the things you would purchase, just abandon them once used?
My first cruise, I had a white peasant-style blouse, black mid-length skirt with a red felt "corset". The blouse and skirt I could wear for other things as well. So not a whole lot to pack.