Just a little tip here about the "Cincinnati side." Its going to be hot as fuck in Kansas City on August 28th. And its usually very dry that time of year with very little cloud cover.
I bring this up because the upper deck at Arrohwead under the press box starts getting shady around 6:30 pm that time of year. It also gets a nice breeze up there. The sun will still be out and I bet temps will be in the 90s up until 9 pm.
Assuming you get into the stadium around 7:30 to 7:45, I can promise you that location will offer some very comfortable seating until the sun officially sets.
Also, the view from there is fantastic.