Look for places in Oroville for eats mid trip. I read yelp on some I gotta tell ya any of them are better sounding than anything I ever had in Yuba City/Marysville.. http://www.yelp.com/search?find_desc=...
Lots of fruit stands along the way (oh 70) along with a couple of great taco trucks.
Quincy has a great natural foods co op, a Safeway and a local grocer. Morning Thunder is great for breakfast as is the Courthouse Cafe. Might wanna yelp for fine dining, I ahve no experience with that at all there.