I have sort of the same situation with a family cemetery in Scotland County, MO. From what I can tell, there isn't much help unless a volunteer group, genealogy group, etc. can help. I think that I am going to ask cousins, etc. to help clean up and put a gate on. Also, my father said that a cemetery that is on private property, ie: a farm, does not belong to the farmer or landowner. In other words, the cemetery is not his property. This leads one to wonder if that neighbor knows this. Might check it out with the county.