I'm basing my prediction on the following factors:

1. It's a Tuesday night game
2. wmu is 2-3 in the MAC and 3-6 overall
3. wmu is coming off a 19-2 loss to rival emu
4. Did I mention it's a tuesday night game?
5. It's a rivalry game...so this may assist with the negatives.

Prediction: 17,000

Students from both schools will represent. Alumni, not so much.

Will the CMU band be there?

15K

I say 17k. Extended forecast looks pretty good. I do not see many CMU students traveling to this, the alums certainly are not going and I do not see a large showing of WMU supporters to be there following the bad EMU loss.

I'll say 19k if the weather holds up. I don't see many CMU fans making the trip.

What if's:
Game played on Friday Night: 23k
Game played on Saturday afternoon: 27k

CMU's band will not be there.