Blue Mounds State Park is an easy drive up summit about 30 miles east of Madison, Wisconsin. It's a state park that has camping, picnicing and two observation towers (one at each end of the summit) that would be great for VHF contacts.
Take County Road F north from US-151. You can easily follow the signs less than two miles to the park. At the summit there is a large loop with picnic areas - the summit proper is at the center of the loop so anywhere would be in the activation zone. There is also a wooden observation tower on the east side of the summit.