I am not sure knees in the backs when you are standing is accurate but did we have a different set up in the Convo?
As a student starting to attend games in the fall of 1973 the setup was full bleachers on both sides. The student section was the west bleachers and the lower bowl behind the bleachers. The band sat behind the basket.
But this did not preclude some students from sitting in the seats right behind the opponent bench in the bleachers opposite most of the students. I can picture the same students, mostly male that sat behind the bench every game. I think I recall chairs used by the players but perhaps the teams sat on the first row of bleachers to give a safer sideline than chairs on the floor. Or maybe the fan is recalling playing in Grover before the Convo came to life.