As others have pointed out, pretty easy to dine ashore in Feb in the BVIs. Checking the Virgin Islands Cruising Guide that will be aboard your charter boat will help you determine what dining options exist in the various overnight anchorages that you are planning to stay in.
Note that once you leave Tortola, many of the smaller restaurants require you to make reservations prior to 4pm. Some will also ask that you select your meal options at the time of reservations to ensure that have your preferences on hand for the evening meals. I have seen on occasion that restaurants that have no evening reservations either don't open for dinner or close early.
Reservations can be made by phone, in person or using the VHF.
Enjoy your trip