OK, I'll say it: corn dogs.
Get me to a carnival/fair and I will eat, and love, foods I would not ever eat at home.
Was in my twenties when I had my first corn dog and every so often (oh, two years or so) crave one.
Hear that some places now sell turkey legs. Have had them, and they are great and I would guess a lot better for you than most of the stuff they traditionally sell.
In NYC street fairs used to love the sausage and pepper sandwiches.
Gosh, I am sorry the season for fairs has passed around here, I am getting very hungry.