I would start looking here:

http://dnrmaps.wisconsin.gov/imf/imf.jsp?site=webview


If you go to the "layers" tab and click "recreation" - it will show the DNR managed lands (Public Land). You can zoom closer into your area and view Aerials of the areas and topos as well. If you need any help with the program let me know, I've become pretty good with it in the past year

Otherwise there's a lot of Public land in my area that doesn't get real heavy bowhunting pressure most seasons. I'm only a couple counties over (Columbia) and I could probably point you in the right direction to find some nice chunks of public land to hunt as well.