It depends very much on the particular church, some graveyard plans do exist, but in this case both the old grave yard around the church and the cemetery in Galley's Gill, have been landscaped, the graves covered over. When the Galley's Gill cemetery was landscaped in 1972 some tombstones were stood up against the perimeter wall, and can still be seen, however the writing is almost illegible. I understand that a few tombstones are also against the wall at St. Michael's and some used as flagstones around the church. Of course records exist of the location of graves in Municipal Cemeteries.
Stan