I'd say SF is more mid-California, compared to what's north of Sacramento. North of Sacramento is pretty rural, full of people wanting to implement the State of Jefferson. But you're right, there isn't much in the way of social services in northern California, due to the population. The only real population centers are Chico and Redding. I haven't spent any time in Chico, but Redding has quite a few homeless, and there isn't much in the way of social services. The City of Redding doesn't have money to burn like SF apparently does, so the homeless pretty much have to fend for themselves. I get the feeling that a lot of Redding's homeless population is on their way somewhere; Redding is kind of a midway stop along I-5 or to the coast.