Sounds incredible. I can't help but think that my photographic interests would be much different if I lived in such a place. I'm sure that's not entirely true but I do love and envy the history in your subjects. Here, in Missouri, it seems that our history is either buried in private property or has wheelchair ramps. While I'm all for the work that has been done to preserve our artifacts, and make them accessible to the public, I feel a sense of loss in the roped-off presentation that many of them receive. Cahokia mounds, near St. Louis, is just such a place. You can see the history in the mounds themselves, and you can hear the history in their state-of-the-art dioramas, but you cannot feel the history.
I have always assumed that you are in Southern California somewhere. Am I on track there?