A. W. Marion State Park Campground offers 56 campsites (28 electric, 28 non-electric) on the opposite side of Hargus Lake from the main park, with access to the 3. 9-mile Hargus Lake Perimeter Trail and additional hiking trails.

The pet-friendly campground features a seasonal camp store, flush restrooms, vault latrines, basketball courts, and a playground, with reservations available up to six months in advance.

Boaters can access the 146-acre lake via two boat ramps at the main park parking area, where electric motors and hand-powered vessels are permitted.