For the west side of Big Bend national Park try Maverick Ranch RV Park Lajitas Texas - great park we paid $35 per night for a week there recently
Take the rowboat in Big Bend Park to Mexico - we had a great breakfast over looking the Rio Grande
How do I get there?
Park at the Boquillas Crossing parking lot near Boquillas Canyon. After passing through the port of entry visitors are ferried across the Rio Grande on a small rowboat for a modest fee ($5 round-trip). Walking across the river is permitted only at the Boquillas Crossing, but is not recommended if the river level is high.
Once across the river visitors have the option of walking to the village (1/2 mile) or paying an additional fee to ride on a burro, horse, or in a vehicle. Local guides are available. Visitors are required to check in with Mexican immigration officials upon arrival in Boquillas. Visitors planning to stay overnight in Mexico will need to apply for a temporary visa. Secure overnight parking at the Boquillas Crossing Port of Entry may be available.