We will be touring Northern California.: San Francisco to Yosemite (which apparently has only one small grocery) then Yosemite to Monterey. Due to dietary restrictions, our food choices are limited and we often buy fresh produce while traveling and sometimes bring a small "fifth burner" and a pot. But I'd like to lighten the load. Does anyone know if there are accessible farmstands by the road on that route? In general it is farm country, just not sure what we'll be able to get & whether we have to get off the highway.