While it's not mandatory to have a reservation for camping at Great Basin National Park, it is highly recommended to secure a spot, especially during peak season (May to September). The park has five developed campgrounds, four of which are first-come, first-served. However, the Grey Cliffs Campground does accept reservations. To learn more about camping options and make a reservation at Grey Cliffs Campground, visit Recreation.gov. For more information on camping in and around Great Basin National Park, visit Hipcamp.