All depends what type of camping you like to do.
We stayed at Big Bone Lick State Park, which was real nice and had a resident herd of bison, as well as a visitor center that interpreted the prehistoric mammoths and mastodons that came to the area for the salt licks.
Link to park info hereIf you don't mind travelling a bit, you can also visit the Creation Museum.
Also see this thread -
Link here