We are planning to make some type family fun weekend out of it. There is a small waterpark north of Bloomington/Normal about 1 hour that we will drive by coming from Wisconsin. We plan to stay there Friday night so my boys can have some fun and then we will drive down to the game (which is great that it is a 2pm kickoff) Saturday morning.
Depending on what direction you are coming from and heading home, there isn't much for awhile after Bloomington/Normal, so you may want to look up some places ahead of time.