Camping on Dry Tortugas National Park costs $15 per site per night. This fee is in addition to the entrance fee for the park, which is $10 per person and valid for seven days. Keep in mind that camping is only available at the Garden Key campground, and you'll need to arrange transportation to the park, as it is accessible only by boat or seaplane. For more information on camping in Dry Tortugas, visit Hipcamp.