Where can i find a listing of food truck events in orange county ca?

-I'm looking for a website where I can find a gathering of food trucks. I've found listings for individual trucks and for events that have already happened, but would like to do something this weekend...On the cooking channel, there is this show called Eat street and it is about different food trucks in big cities such as the grilled cheese truck, the big gay ice cream truck, etc. Go on the Cooking channel .com and go to a listing of the shows there. Find eat st. and they might have a listing of popular food trucks in big cities.
As you may already know, some of LA's famous food trucks do go to the OC, here's a site that might help: http://www.findlafoodtrucks.com/
I would call the police or sheriff's department in that area and ask. I believe that they may know because permits and law enforcement may have to be involved.