Austin is a big food truck town. I like a lot of them because they're often doing something different, maybe an ethnic food that we don't see around town all that much, or more often, some kind of fusion. There's one called "Chi'lantro" that's a fusion of Korean and Mexican and American. Kimchi fries, Bulgogi tacos. It's really delicious.
As for State Fair food, it really just depends on which one. The Texas and Minnesota state fairs, are famous for all of new innovative concepts that are introduced each year. The Texas State Fair even has a competition for new entries, and rewards the winners with cash and prizes and publicity. But of course the old standbys still carry tremendous weight. I can't miss having at least a couple of Fletcher's corny dogs, whilst at the State Fair of Texas.