I would try a deep-fried Klondike. I mean, really, how bad could it possibly be?

Topsfield is the biggest local fair in my area. If we wanted to go to the actual state fair, which is much larger, it's way out in Springfield, the far west corner of the state. Only two hours of travel as opposed to your three, but still farther than I'd like for a day trip. Someday, maybe.