Very nice PG&E site right on the east part of Lake Britton, across Hwy 89 from Burney Falls SP. Camp hosts live elsewhere but visited several times a day even in mid-April. Most sites are just across the access road from the lake, with narrow rocky beaches.
The access road is gravel and ends at the campground, even though Google Maps shows it continuing all the way to Hwy 299. The two old rail bridges are unsafe for foot traffic but very scenic, one over the lake and one over Hwy 89.
Nice hiking along the north side of the lake on the old road, which appears to also have been a Diatomite mining railroad grade. Bring headlamps and good filter masks like N-95s for exploring the many mine shafts along the old road. The finely powdered Diatomite is bad for your lungs.