There are a bunch of neglected granite walls up in Neff's Canyon that you can camp at. I believe they are mostly trad climbs but there may be some sport.
Getting There
Neff's Canyon is the canyon exactly South of Millcreek Canyon up in Olympus Cove. There are a few walls not far up the right hand canyon- direction is pretty self-explanatory- and another area up the left hand canyon. To get to the one up the left hand canyon (Chadborne) go up past the grove where the canyon splits to left and right and keep going up until the trail descends. At that point there will be a trail to the right that just looks like a game trail and you follow that trail to the cliffs. A bit of a warning, this trail is steep, switchbacky, and pretty long.