Maybe it's time to meet some people in SF... Just a thought. Not trying to be mean or nothin'; i understand you're in a tight spot, and believe the interwebz is your only salvation... But it's NOT, yo, it's just NOT!! Go to the Haight... go to Golden Gate (and AMEN, do those hills SUCK!! But it'll make ya stronger...
, go anywhere, find anyone, do anything (sorry, it's in a song i'm listening to right now... seemed appropriate). Seriously, though. I know it's hard, really, I do... Maybe you just gotta sit on a sidewalk with a pack and crryyy, see what sort of angels 'n devils come to your rescue...
Best of luck; I don't really know too much about free sleepin' there; I would automatically go with GG, but that's just me....