I would really look hard at the following...depending on size of festival, etc...I would consult with fire departments etc.

1. Electrical wires all over the place. Safety in thunderstorms etc.
2. This one gets me all the time at folklife..they have open grills, extremely hot, right out in the flow of traffic..sometimes a little rope barrier...cooking shish kabobs etc. I think anything like that should be barricaded and out of the flow of traffic, period. Too easy for a child to get pushed into something or caught on fire etc.
3. Crowd control and liquor control and concealed weapons and gang possibilities etc. Gun went off at Folklife this year and wounded a couple of people.
4. Sanitation -- give free admission or whatever to people who monitor and clean bathrooms.
5. Hire security as needed. mg