The BVI are great cruising grounds with beautiful scenery and plentiful
anchorages, bars, retaurants and beaches within daysails.
I would take
provisioning out of your
boat equation - there are places to provision all over the BVI (even
Anegada has a store to stock up on supplies) and boats will have sufficient room for provisions for several days. I've been at the docks at Sunsail, Moorings and other
charter companies when the
charter boats return and the amount of
food and supplies left over is stupendous and certainly forms a large part of the dock-worker's bonus income!
How many people are you planning per
boat? The newer cats all have simple
rigging and are, as far as heavily loaded catamarans can be, relatively quick. Most destinations are within a couple of hours easy sail for even the smallest monohulls. The furthest distance in the BVI would be from Soper's Hole to
Anegada and (if it weren't almost dead into the
wind 90% of the time) only about 35nm.
Perhaps our wakes will cross in October - if you see a blue boat named "Zanshin" in an anchorage then come on over (or better yet, invite me over

).