Call the nearest large food bank (as in, the county food bank that serves a city with a population of X00,000+). I suspect they would be happy to share knowledg

Call the nearest large food bank (as in, the county food bank that serves a city with a population of X00,000+). I suspect they would be happy to share knowledge, there may even be a meta-organization you can join to get help running your organization. I don't know where you are or how it's done there, but as a single data point the food bank for Alameda County (a fair bit of "East Bay" in the SFBA) would work with an organization like yours by having you come in and pick out piles of food from their warehouse for free or hugely reduced prices.