We chartered thru Sunsail and provisioned thru them -- while it was definitely more expensive than doing it ourselves, the convenience was definitely worth it (it was our first charter). Rather than ala carte provisioning, we ordered all breakfasts and lunches and one dinner for our 1-week charter. We found Sunsail to very *very* generous as far as the amount of food allotted per person, so could have ordered food for fewer days and still had enough. Convenience aside, next time we'll probably provision ourselves and stick to simple PB&J-type lunches and cold breakfasts -- it will save several hundred dollars (honest). In Tortola, best provisioning is Bobby's Marketplace
. We wanted to add a few items beyond what we had ordered from Sunsail and Bobby's sent a van to pick us up from Sunsail base and drove us back after shopping.