Evansville was a hotbed of clan activity in the 70s.
I grew up in Evansville. In my teenage years in the 80s, there were rumors of Klan activity down by the river. Some friends and I (I was in high school) went near there with binoculars, telescopes, etc. We did see about 15-20 men conducting some sort of ceremony near a fire, but no hoods, etc. It was weird and rather ominous, since we were afraid of being detected. Our curiosity satisfied, we never checked it out further.