I found out the hard way that the windsurfing beach at Hillsdale is closed but that the state park will open it for you if you ask at their office right before the dam. BTW it takes 45 min. to drive from Hillsdale to Clinton lake Via Highway 56 through Edgerton and Baldwin then to 59 to SLT west to CLinton.
Solid 4.5 thursday at Clinton.