3 backcountry cabins for summer visits along the park's coastline are located in the fjords of Holgate Arm, Aialik Bay, and North Arm. The cabins are accessible by boat, kayak or small plane. In winter, a public use cabin is available at Exit Glacier. Cabin stays are limited to three days. Visitors must obtain reservations and permits in advance. The park takes summer reservations from January 1 through April 30; after that availability may be limited. Reservations can be made by calling Park Headquarters.