I know it's difficult to do because the audio is not necessarily up to you, but can you see if you can take a feed from the main mixing board rather than recording it via a microphone in the crowd?
I have heard previous live recordings and they are fantastic, but a little difficult to hear over cheering and crowd noise. A direct feed from the mixing board would definitely put you guys up front in the audio.
Just my thoughts.
Jeff. - a ScotchBastard