I went here on Easter with my boyfriend and a friend. There was nothing spooky or out of the norm. It was very quiet and peaceful. We did find an awesome deer skeleton, and took some pictures, but otherwise there was nothing that was abnormal, spooky, or seemingly supernatural going on.
We also tried visiting the "Insane Asylum" in Jennings, but apparently it is gone and there are new homes on the property.
My boyfriend and I are interested in visiting more 'haunted' places around Missouri -- preferably not more than about 3 hours outside of Saint Louis. Satan's Tunnel seemed interesting, but the pictures of it look sort of uneventful.
Thanks.