Slight seqway on this topic. How were the hiker/biker sites in California from SF south to the border? I've head that quite a few no longer have hiker/biker sites (eg South Carlsbad).
From the Pacific Coast Section 5 addenda (http://www.adventurecycling.org/routes-and-maps/adventure-cycling-route-network/map-addenda/):
Some of the CA state parks have closed their hiker/biker sites due to vagrants. You can find a updated list of hiker/biker sites by searching "Activity/Facility" at this site: www.parks.ca.gov/parkindex/
Hope that helps.