Very cool picture Smoke! The biplane makes for good scale comparison. The Navy did operate the four you mentioned, and the ZR-2 which crashed like you said which I included in post #6 because even though the Navy hadn't excepted it yet it hag been given the Navy ZR-2 number and there were Navy personal on board that were killed when it crashed. The sixth one was the ZMC-2 which was much smaller and looked more like a blimp, but was a rigid airship with a Alclad skin. It was the last remaining Navy airship not being scraped until 1941.
Terry its amazing that those sheds are still there. The huge hanger that the Shenandoah was being constructed in above is still there in Lakehurst NJ also. It was featured in an episode of the X files a while back