What are some good, inexpensive camp sites in the south-western area of Ohio?

I would very much like to take a camping trip soon to take a break from college. As a poor college student, I would place inexpensiveness towards the top of my priorities. I would be camping in a tent, not an RV or anything like that. I do NOT need power receptacles, nor will I be fishing or hunting at all. Walking/hiking trails would be a plus, and so would a lake or anyplace to swim. And I would like to be able to have my own campfire. Also, I would prefer to be in the middle of no where. I don't want to have another person camping in a little camp area like 5 feet from me. I want to be spread 100s of feet away from other campers if there are any. I know this is a really picky list, but I would settle for just inexpensive. Thank you to everyone who reads this. And an additional thank you to everyone who gives input. Links to websites would be nice, as would personal past experiences of places in this area that you have camped at.