Not from East Bay, but living in SF city and keen on doing day trips here or further out. HMU if you'd like a partner!
I haven't explored that much recently, none of my local friends are into this stuff. I lived in Berlin for a few years and would explore when the right friends were in town. Back in England where I'm from, a bunch of us used to break into these formal fancy parties at our university and that's how I developed a taste for this stuff.
Most recently I took a colleague to Mare Island Naval Shipyard. It was easier than I thought, it's undergoing redevelopment but all the workers totally ignored us and we walked around pretty freely taking photographs even in the "No Trespassing" areas.
hi-res pics at https://mega.nz/#F...a_1duySwr3GHWpklEQ