I just want to put a word in for Samuel P. Taylor SP, which is about 30 miles north of San Francisco. The H/B site is in the redwoods, with some terraced sites, and they have showers. There is a set of community picnic tables and fire ring, and one or two sites also have their own picnic table. Just be aware that the are lots of raccoons, I saw a sickening amount of them last time I was there.