Actually, most of the public places are in northern or NW WI (there are a couple in NE MN too) I don't know of much in between La Crosse and Madison.
There is Mcaslin (sp) Apple Valley, Nicolet Ntl Forest has some logging roads, etc. If you go to LOST JEEPS, there is a post in the Midwest section that has a bunch of them listed. Otherwise, yes, check out WOHVA too.
FYI I'm in Madison, so if you do find some closer to "home" let me know