What are some camping options near the coastline of San Francisco?

Some of California's most inviting stretches of coastline are within a short jaunt of San Francisco, from the dramatic cliffs of Point Reyes National Seashore in the North Bay to the sandy shores of Half Moon Bay, south of San Francisco. While many of the camping options in this area are on private land, some state-run parks, such as Salt Point State Park, have campgrounds.