Big Bend National Park
The only hike in Big Bend National Park with designated campsites is the South Rim Trail (14 miles, 2000ft return). Late fall to January is likely the best time to visit with falcon season running from February to May
The southeast corner has the Marufo Vega loop (14 miles, 2000ft). The trail is wide open and leads to the Boquillas Canyon section of the Rio Grande. Camp can be anywhere off trail