Many years ago my brother and I went there to look for our maternal ggp’s graves. It was open, but there no help available then, either. The Cemetery is fairly large, but not as big as many of the others in NY. It took us about an hour to find it.
As an aside, our plan was to look from back to front, each of us having our own territories. Of course, with our luck it was in the front. When we told our mother who was about 75 then, she said “you know, I remember going there as a kid. It was right by the front fence.”
Good luck. See if some elderly relative can remember anything. If not, prepare to do some work. It feels like striking gold or oil when you find it.