I have searched the area AROUND an old abandoned cemetery before. I happen to know of one in the middle of a pasture, at the top of a hill. There is a square of pine trees that has not been cut, and that is where the cemetery is. I know it because my grandmother showed me where my great-great-great grandfather was buried there, his grave marked by a big rock. There had been a church associated with the cemetery, which had burned in the 1860s. I searched all around the cemetery, found the church location by a profusion of square nails, found a few odds and ends (no coins), and also found a confederate infantry button. I would never search IN a cemetery, but that isn't where people are likely to have dropped anything, anyway. Search the outskirts - there probably was a church or a pavilion of some sort associated with the cemetery. There likely may have been a picnic area close to it, since the community often got together once a year to clean the cemetery and have lunch on the grounds.