I have sailed out of SXM twice and I would suggest that if you are checking a bag to prepare meals before leaving, vacuum seal them, hard freeze them and bring them along to help save some costs. We always over night in Grand Case on Tuesday in high season for Harmony Nights (they changed the name now)which is a nice street party with food, music and shopping. We also enjoyed overnight in Marigot to pick up provisions, shopping the open air market and to climb the old fort ruins of Fort Louis.