A Grave Concern: Any suggestions?

I’ve written before about being a part of the Collinwood-Nottingham Historical Society’s project to locate the graves of the children who perished in the Collinwood School Fire of 1908. Of the students for whom we have burial information, all but 4 were interred on the east side of Cleveland or in one of its eastern suburbs. One child, Dorothy Hart, is supposed to be buried at Spring Grove Cemetery in Medina, Ohio, and I have an email in to the cemetery sexton asking for assistance in locating her burial records and grave. There are also three boys (Norman, Max, and James Turner) whose bodies were sent back to Oswego, New York, to be buried with their grandmother. Unlike with Dorothy Hart, however, there is not a specific cemetery listed in the records. I’ve found some Collinwood victims in a completely haphazard manner – just going to a cemetery to do photography and finding them, but I can’t very well head to Oswego for the morning to do the same. Also, Oswego has a number of cemeteries listed as being in the city, and there are more in the county as a whole. I tried searching on Find a Grave to see if some kind soul had by chance already created a memorial for the Turners. I am taking any suggestions on where to start to narrow down my cemetery search and figure out which Oswego cemetery they rest in.