Try to divide up the leadership tasks. Determine who will take ownership of the meals aboard and have that person order the groceries or go to the market and cart that stuff back themselves on Tortola. Do not sweat or have anxiety over the tasks of others. If one or two WORKING TOGETHER do not want to own the galley. Then consider allowing each willing crew to take ownership of preparing and cleaning up soup to nuts one meal aboard. I also know some who never eat aboard. In any case do not fret over any of this. Many show up and do everything after they arrive at a boat or condo. Some will want to see the galley first, see and touch what they select.
If you really must worry about this. Order the heavy stuff to be delivered on your own. Order one solid meal and 24 hours of FULL provisions. Then allow someone else to self nominate the ongoing planning and below deck FUN.
If someone is great and willing to do all this planning and pre-trip obsessing wonderful! In the BVI there is really no need to do that.
The most important part of all this. Never worry about it. Never try to do it ALL yourself or control all of it yourself.
Our best trips are ones where one person takes the role of dinghy and ice captain, another one or two galley leadership, and a third primary helmsman and boat captain. A grillmaster can be a nice touch along with a king or queen of the boat hook. Each of those leaders should be a most willing volunteer.
The last general rule of group harmony. The boat never moves until everyone is ready to move on. In the BVI less is generally more and many miss the best parts of the limin in the rush to sustain some plan made on a couch 1,000's of miles away.