First of all, I'm not talking about filling in the corners with stands. After looking at the stadium pic in this tweet:
https://twitter.com/dufftittle/status/638803660588249088?s=09
Would it be possible to fill in the corners with some sort of sound reflective fabric or other material? It would enclose the stadium nicely and probably wouldn't take long or cost too much to put up. Just a random thought to keep from going crazy while I wait for Saturday to roll around.