The stage ran the whole length of one end. Typically they would have three bands with the best show held on Saturday night. The line up would typically consist of a good area band, a regional band and a headliner.
The stage was wide enough so that the bands could set up side by side with the headliner in the middle to cut down on time between shows. On 8/03/68 the second band was an area band from Rockford, Il. The band was in transition and was either named The Grim Reapers or Fuse at the time. Later the band evolved into Cheap Trick. They played on the left side of The Who. It was a cold, rainy night so the crowd had to pack in under the roof and could not overflow outside. As a handful of us went to school with members of The Grim Reapers / Fuse we were invited up on stage after there show and sat amongst their equipment while The Who performed their set.
I remember sitting about eight feet from John Entwistle. I do not remember the exact set list (we went to shows like this every weekend) but I would say it was very close to a "Live at Leeds" style show. The Grim Reapers had performed early Who songs for years and we were familair with and pleased that they did a lot of early songs.
(Source : not known)