It's there. Its Google coordinates are 42.058151, -75.337568. Alternatively, it's 42°03'29.3"N 75°20'15.2"W. As
Mathews said (see above), it looks like a bunch of trailers and junk. It's on Moslem Road, near the intersection with Roods Creek Road. It's a little less than one mile south of the Cannonsville Reservoir.
You can see the quarry where they're reputed to have done machine-gun practice. It's between "Islamberg" and the reservoir.