Check-in takes place at the Cumberland Island National Seashore St. Marys Visitor Center, at 113 St. Marys St., St Marys, GA 31558. What do I need with me to check in? Come prepared with your ferry reservation confirmation, ID, form of payment for park entrance fee and ferry fees (if ferry fees not paid in advance), America the Beautiful Pass (if you are a passholder), and camping permit (if camping).