Time limit: 10 days in each district per year. That is, you can camp in a given district for any 10 days out of the year, regardless of when they are. There are 4 districts, so you can camp in the forest for up to 40 total days per year.
This is California, so (free) permits are required for campfires.
Visitors can camp “just about anywhere in the forest, unless specifically prohibited”; and not around 9 specific lakes; and not within 100 feet of a stream or lake; and not within the boundary markings of a developed campground.
Vehicles must be parked within one vehicle length of the edge of the surface of an allowed road.