If you are going to the State Fair on one day this year, might I suggest Thursday, August 9th? That's when Indiana's historical and genealogical groups will be strutting their stuff.
The all-day event is the Hoosier Heritage Day, so stroll around the booths and enjoy yourself. The Indpls. Star is supposed to have a free coupon on Monday, the 6th, to get in on Thursday--an added bonus. And I don't know about you, but I'm taking the Fair Train from Fishers--the heck with paid parking. See you at the Fair--and don't eat too much!