I rarely ever see Wisconsin, maybe 3-4 times, but I dont ever go out of my way either to look, so maybe dig around a bit and you'll find something. For the most part it seems to focus on Texas, New York, California, Michigan, and probably Maryland, but just about every state gets something.
The key is to honestly google screeners in your area, look up contests on twitter and see the sties the contests run through and try to follow that site directly. Thats how I found those 4-5 sites I use. Now that the summer blockbuster season is coming to and end, there are just screener galores.