There is camping all along Rampart Range Road, just south of Highway 67. This is about 15 mins from the Chutes and 30 mins from Foxton. This area is full of dirtbikes and ATV's, so it's not peaceful, but it's free and legal. To get there, drive a couple of miles upstream from "the" chute, go up rd 40 (which interects the S. Platte just downstream from Nighthawk), take rd 40 to Sprucewood, then follow 67 north/east. Rampart Range Road will be on your right. Check out Google Earth. Starting at the river, this is apprx 4-5 miles of dirt road to Sprucewood and another 4-5 miles of paved to RR Road. Other than that, there's always that one "tent city" along the chutes run.