There are two campgrounds behind the entrance station. The more expensive one costs 35 dollar and has flush toilets and showers. The other one is about a mile away and costs 20 dollars. With clean pit toilets and water spigots. No showers there and you are officially not allowed to take a shower at the other campground. There is a dump station.
T-mobile gives a signal at most sites.
Two dollars discount if you are 62+.
Great campground. We stayed at the cheaper one. Can be windy.
Place: San Simeon Campground
Location: 35.59528, -121.11123