The REAL TREAT is the first Saturday of each month he gives the tour his self. His knowledge of the Presidio, and all things related is without comparison.
http://www.presidio.gov/explore/Pages/ggb75-before-the-bridge-sight-and-sound-at-the-golden-gate.aspx
Check this Video out!
http://www.ktvu.com/videos/news/before-the-bridge-sight-and-sound-at-the-golden/vHSBn/
