*SUGGESTION ~
**Print a menu for each vendor & hand them out when you arrive, and bring a "delivery" person! Vendors will purchase from you, as well as shoppers. In case there is a lot of traffic & vendors would like lunch from your truck, having a menu & a mobile # where vendors can text you an order, will be beneficial for extra sales! I am also a vendor, trucks who gave me a menu at the beginning of each event, were the ones I ordered from, when I couldn't break away from my booth!! All booths will have numbers, so they can tell you exactly where they are, for delivering their lunch! I'll give you a layout with booth #s.
Just a thought !