Found Mud Lake public park access at 3300 County Highway M, about a mile west of Milton.
Paved entrance road off County M with red city park sign. Very small parking lot. Access to the lake is from a dirt path perhaps 100 yards long with a 40' tall hillside to navigate between the lot and the lake. No small task to get up or down, especially with a sled and fishing gear.
Found mostly small perch sub-six inches. Some better. Some bluegills / crappies, but not great size. With area high lake levels, water depth was mostly 11' to 14' so plenty of water to fish.