Wisconsin has many great areas, ranking up there with Michigan and Minnesota. All you need to do is find a good woods that has been there a while left undisturbed, and there will be morels in it!
In the south- The woods in Yellowstone Lake State Park, North of Monroe.
Kettle Moraine State Forest North of Elkhorn
Devils Lake State Park near Baraboo
Point Beach State Forest near Two Rivers
Black River State Forest in Jackson County
Chequamegon State Forest in Taylor County
Nelson Dewey Stae Park near the river....
Nicolet National Forest in the north
Brule River State Forest in the extreme NW corner