You can get directions by going to www.cpxsports.com
The best field that I have been to yet. They have a proshop on site, so it really helps (may not help your wallet that much.) I went there for the Windy City Classic this past Oct. 14th. The Ref's were great. At one point, I was using one as a bunker...and he just joked about it.
They have a number of fields of play, including a small town they built complete with parked cars, paved roads and buildings. This park is great.
The only downside I see to this field is the fact that they do not allow for BYOP. While that is a very small short coming, it may drive some people to another field.