I would ask Moorings that question. Ferry arrivals have been pushed back to March (I think). And it would just depend on where / if you can clear into BVI. There are a lot of unknowns there and personally would not count / plan on that being an option for near future.

My advice - for a near term trip (1H 2021) - make a decision. USVI or BVI. USVI you can do 7 day charter, no problem. BVI I would go 11 for 7