Under Yellow Post Sites you have that there are no current fire restrictions - but there are! No campfires or charcoal fires are currently allowed anywhere on the National Forest. Best to point folks towards the San Bernardino NF Website Fire Restriction Page to get the latest info.
The limit is 12 people per wilderness permit. Permits for the San Gorgonio Wilderness can also be obtained at the Barton Flats Visitor Center when it is open (usually on weekends in the summertime).