The Caddo River splits off from the bigger Ouachita in south central Arkansas south of Hot Springs, about 30 miles or so. Leaving Oaklawn Racing and Casino, head south on Central Avenue, past nearby Lake Hamilton, and continue down Route 7.
On the way there, if you make a little detour, you can visit Prairie Bayou. Farther south on 7, which parallels the course of the Ouachita, you’ll wind up in Camden, not far from Cox’s Ridge, so small it’s not even marked on a map, and where the most famous resident – heck, the only resident – was Charlie Vanlandingham.