There used to be one out of Tortola or St Thomas, can't remember the name now, not sure if they're still doing them or not. They used to have a little B & B, you could do a couple days on land, and then some on the boat. They may have gone out of business. Mustang Sally used to do them, but they definitely don't do them any more. I think that Philippe with Tiko Tiko does some overnight charters. You might check with him, and if he doesn't do them, he might be able to recommend someone. Either that, or contact Bob Cass at Souliga Tours for a recommendation, as he might know someone.