We pulled into North Sound and anchored off Prickly Pear beach about 4 years ago. We had a visit from the BVI customs boat. We were two charter boats, but 'unmarked' with any advertising. I think they focus on 'entry' points from USVI and lower Carib, looking to make sure that the entry fees and permits have been paid.

Boats from USVI such as CYOA charters might be good targets because they may not have stopped and paid immediately upon entry and might be making some stops before they officially check in.