There is now a charge. The USFS has a concessionaire permit for Scenic Canyons Recreational Services, Inc to do their dirty work. $5 is charged so you can crap in a nice clean toilet at the trailhead. The campground hosts drive around in a golf cart checking cars at the trailheads.
"As an adolescent I aspired to lasting fame, I craved factual certainty, and I thirsted for a meaningful vision of human life - so I became a scientist. This is like becoming an archbishop so you can meet girls."