I went caching in Petaluma and visited some caches on the old Hamilton AFB. We went on bikes, and I had a blast riding around on the old runways. Go, visit, take your bike (bigger tires are better, there are gravel trails and lots of potholes on the roads.) It's great!
As far as the cache goes, allow yourself some time to do a thorough search, and please re-hide the cache as well or better than you found it.
Parking is to be had at N 38 03.696 W 122 31.534. There are other caches to be done in the area, be prepared!
Abg va nal irtrgngvba.