The obvious advantage to meeting at sopers is that you will see the ferries coming in. This is a big plus if you don't have cell phone contact with them.
Otherwise, why not attend to your needs in sopers, move on to cgb and enjoy your day there.
Warren S/V Scuba Doo Lagoon 50 (winner of best crewed yacht under 55 feet at the St. Thomas crewed yacht boat show).