Campgrounds at the Basin, Castolon, and Rio Grande Village provide water and comfort stations. Electricity and fuel are not available, except that the concessioner sells charcoal. Ground fires are not permitted. At Rio Grande Village only there are pay showers and laundry facilities for campers. Large groups may make advance campground reservations, but families, other small parties, and individuals may not. A number of backcountry roadside campsites are located along the park’s backcountry dirt roads. A free permit, available at any ranger station, is required. If you are interested in a primitive site, ask at a ranger station. Trailer Parks. Rio Grande Village trailer park has hookups; use of all hookups is required. Consult a ranger before taking trailers into the Basin campground. The road to the Basin is not recommended for trailers longer than 6 meters (20 feet) or RVs (7 meters/24 feet) due to sharp curves and steep grades. Stores and Service Stations. Groceries, cold drinks, camping supplies, and film can be bought at the Basin, Rio Grande Village, Castolon, and Panther Junction. There is a gift shop in the Chisos Mountains Lodge. Minor auto repair service and gasoline may be obtained at Panther Junction. Gasoline is sold in the park at Castolon, Rio Grande Village, and Panther Junction only, so check your gauge before you leave U.S. 90, and periodically in the park. Saddle Horses. You can arrange for saddle horses, pack animals, and guides in the Basin with Chisos Remuda, Basin Rural Station, Big Bend National Park, Texas 79834. Naturalist Programs. Illustrated evening talks are presented in summer at dusk at the amphitheater in the Basin, and in other seasons at Rio Grande Village and park headquarters. Schedules for all programs are listed on park bulletin boards. The naturalist programs at Big Bend are designed to help you understand and enjoy the natural and historic features. The park road system features wayside exhibits and markers about local attractions. The Dagger Flat Interpretive Auto Trail leaves the park road south of Persimmon Gap. Self-guiding trails are located at park headquarters, Dugout Wells, Santa Elena Canyon, the Basin, and Rio Grande Village. A descriptive booklet is available at the head of the Lost Mine Trail in the Chisos Mountains, to help you identify plants, animals, and panoramic views. Park naturalists and rangers provide many other services to interpret the park’s geology, plants, animals, and history. You can supplement these personal services by purchasing maps and publications at park headquarters in Panther Junction. [Illustration: A rainbow cactus in bloom is about to be immortalized by a young photographer.]