The dock house at Garden Key is located on the dock where the ferry lands. It is dead center of Fort Jefferson's only entrance, the sally port.  

Changing Rooms
There are changing rooms available in the dock house on the East side. The rooms are open 24/7 and are handicap accessible with handrails and benches. 

Information Room
On the West side of the dock house, there is an information room with park brochures. Private boaters can pick up and fill out a boat permit at this location. Useful boating, diving and fishing material can be found here, along with a marine band radio for required visitor use. As soon as available, tide charts and weather are posted in this room. 
The dock house information room is a great place to start your Dry Tortugas visit. You can learn more about what to do and find information to help you have a safe and enjoyable time.

Fee Station
You can pay your park entrance and camping fees here.