A large area you speak of in WI is in the Chequamegan National Forest in the Clam Lake area, where the old ELF line was, which was officially closed/tore down about 10 years ago now. The silly thing of it is, like you say, is the fact that they wanted to shut down the forest roads themselves, in an attempt to keep people out of these two-tracks. But they still maintained the forest roads in the summer. There are lots of FR#'s for the old two tracks that have seriously over grown now, to the point where I highly doubt you could get through very many any more.
So if those of you in the UP want to keep access to the two-tracks, fight now, as nature will take over if the gov't is allowed to do what it proposes.