Easily spend your time exploring STJ and STT if your usual haunts are in the BVI ----- STX or the SVI are available if you enjoy the boat moving and sailing.
Circumnavigating STT and STJ can easily give you a new anchorage every night - admittedly with a lot less shoreside entertainment or drinking/dining options but varied and interesting in other ways.
It would be a less social vacation and if you take on a " Enjoying life aboard" experience - more akin to a cruising lifestyle than a typical 'vacation charter' - could certainly be a great trip.