Dead in Edwardsville, IL

[Randy Thaler]

I saw the Dead at the Mississippi River Festival in Edwardsville, IL, in the 70s, and I'm trying to figure out what year I saw them.  The only 2 shows I come across that they played there were 7-8-70, and a show in 1980.  I know it wasn't the '80 show because I was away from the area by then, but the '70 show seems a little bit early in my life, although I could have attended that show.  Does anyone know if they played this venue any other times in the 70s, and if tapes/CDs exist of the shows?  Thanks.