This has long been known as the first show ever performed by DMB; however, Stefan found a recording of a prior show after stating that he didn't remember the Earth Day show being the band's first. This show was also thought to have taken place on April 20 and at Meade Park, but an article in the Cavalier Daily
confirms that this is the correct date and location.
Boyd was a "special guest" at this show. The setlist is thought to include Recently, All Along the Watchtower, and Exodus, but there is no way to verify that.
Boyd has recalled on his twitter that Miguel Valdez sat in with the band as well, and he speculates that they most likely played Warehouse, Tripping Billies, Recently, and maybe Cry Freedom.
First known time Boyd Tinsley