I hope you let someone at the courthouse know where these are. Probably varies by state, but the presence of a cemetary affects buying and selling land.
Dad and I found an old family cemetary a long time ago. I was on an XR75 if that tells you anything. The graves were mostly from 1840 or so. That land changed hands 10 years ago and nobody knew about it. Dad just happened to hear the right person talking about the land selling and brought it up. It's much easier to get to now. A big middle finger to whoever stole the iron fence around it.
I like to stop and take breaks at these places, especially the old ones.
When you come to a fork in the road, take the single track instead.