Food Truck Recommendations/Sources

Where are y'all going for your food truck needs? I have event at the Houston Police Academy this Sunday and our person that usually schedules the food truck has left the chat. I've never had to find a food truck and it seems a lot of them either want deposits or payments prior to attending. The trucks we've had at our events in the past know that we have about 200 people at the event and a good portion of them will order whatever is available.