Been there in December 2013. You can provision or get food on Caye Caulker too. Not much to see there compared to BVI's. are you Ttm Charters? They are in San Pedro. There are quite a few stores in SP but after that only small store or stores in Caulker.. I would stay in Ambergis verses sailing there because of areas to sail in. Winds can be strong during hurricane season and December winds too.. Good luck!