Was just there on Sunday. If you're ferrying back over, you'll stop at Redhook and not Charlotte Amalie. Our ferry (9am on Sunday) was only half full, so that wasn't a big deal, but the airport was a nightmare. About an hour and a half from checkin until we got to the gate area. It's probably worse on Saturday. As you know, you have to check in 1.5 hours prior to your flight or you'll be denied boarding, so give yourself PLENTY of time to get through the whole process, especially on the weekend.