My wife uses a cane. Do you have a TOAD? We always stay at Rio Grande Village next to the river. Altho it is just a large, rectangular paved parking lot, it is full hookup & in the center of many sites to explore by car or RV. Ask ranger about seeing the Mexican town of Boquillas just across the river and Santa Ellina canyon.(How does one spell Ellina?)lol. On the west side of the park is the (kinda)Ghost town of Terlingua. Make sure to see the old Mexican cemetery there. The old trading post has amazing stuff.