Do you need a permit to camp near Sacramento?

Yes, you need a permit to camp near Sacramento in Desolation Wilderness, for any overnight trip.

In Eldorado National Forest, you also need a free California campfire permit for a wood, charcoal or gas fire outside a developed campground. Along the BLM's South Fork American River, you can camp only at designated sites with a Special Recreation Permit. Rafters on the American River can get permits to camp in some areas outside Auburn State Recreation Area's campgrounds from the ranger station in Auburn.