Better check with the health dept about setting up somewhere besides a festival. I have a state wide permit for a mobil food concession but...
Here in KY you can't setup in the same spot for more than 14 consecutive days and then you have to move and can't come back to the same spot for 30 days.
This law have pretty put me out of business for the season. If I can find 3 spots to setup, I could them move around and get around the law... but good spots are hard to find around here.