Exactly what Marubozo says.
In Alameda County, no food truck is licensed to prepare or store food on the truck. They must use what they packed that day, or destroy it. All food must be stored at a commisary, and all cold food prep, and cooking must occur in a commercial kitchen.
Involving the Army in a simple picnic turns out to not be as simple as I thought.
"perhaps...but then again...maybe not..."