If memory serves me correctly, the first-ever Silver Crown run under the lights at DuQuoin was run after the fair because of a rainout. It was either in 2001 or 2002. I remember Tyler Walker blew the track record to smithereens. I believe it was fairly well attended. That may have before the Bob Sargent era. It was nice to be able to park right behind the grandstand was one my memory highlights.
I consulted my record book, but it didn't really help me determine which year it was because there were no really late dates in September showing, they were all early in the month.
FYI, the Indiana State Fair is canceled. Our beloved Frog Follies is canceled at the Vanderburgh Fairgrounds.