I have also been to Greene Sullivan in Dugger Indiana. It's definitely a bit more rugged than Midwest, but the trails are awesome! They have every level you could want, from very easy to single tracks winding up, down, and around. Very reasonable camping fees, and they also have a day ride parking area. No showers, but they do have a port-o-potty style bathroom. It is a first come first serve type of place, the first time we went were actually the only ones there.
JW Jones is a great place to day ride, from what I've heard camping is no longer an option due to dumb-dumbs vandalizing.
I have also been to Corydon in O'Bannon forest. Great place, but very challenging trails with a lot of rock.