Moorings can do it!  Base in Rodney Bay.
$1500 one way fee.  $200/day for skipper.
All the research I’ve done suggests down island is the best way for sure. Long slog if northbound.  Yes, three island C&I but that doesn’t look too bad and current plan is no weekend C&I.
We’re strongly considering, wonder if the 30nm blue water trip from St Lucia to St. V is a pro or con.  May skip St V altogether and check in at Bequia instead?  I can’t see doing it in less than 10 days.