Group Cabin Camping - Prince William Forest Park (U.S. National Park Service) Cabin Camp 5 was the last camp to be completed by the CCC and WPA. The camp offers the largest capacity (210 in summer, 104 in winter) due to the large dorm buildings and restrooms. This is also the only camp with heat, so this camp may be rented year round. This is also the only camp to have an outdoor picnic pavilion located inside the camp. Learn more about Cabin Camp 5. Each cabin camp includes sleeping cabins, bathrooms, a dining hall, craft lodge, and access to a ballfield. All cabins are equipped with overhead lighting. They are NOT equipped with air conditioning. Large barrel drum grills are available by reservation and for an additional fee.