There are a limited number of electric campsites so I would recommend booking early if that is a requirement. Otherwise, there are plenty of non-electric sites available.

John Bryan has some absolutely beautiful trails within the park and a short drive away. The town of Yellow Springs is absolutely adorable and worth checking out while you are there. There is also a nice bike trail through the town. The Clifton Mill is also nearby and is worth the stop.  The Cedar Cliff trail near to the park and the Clifton Gorge State Nature Preserve is a must.