Our local Pepsi distributor has a "wagon" that they have let us use for various events. It's a trailer that has a setup to vend food, like you would see at fairs and events like that. You would have to see if you have a distributor in your area and contact them. They let us use their wagon because we purchased our beverages from them for all of our events at the school(and because the manager is a really nice guy!).
I read somewhere here on the boards about Pepsi haveing a snack cart or something that they allowed school's to use for events. Does anyone know anything about this at all? Thanks again! Beth