Thanks for the pictures! I am overcome with a huge case of nostalgia...

When you say - tracks the size of a small house cat...possibly Ocelot - could be, but why could tey not simply be a small house cat. Idon't know for sure, but I would not be surprised if there are not feral kitties about the place. Tucson would be too good a source, and there are residential areas right up against the boundaries.

I assume that was a picture of Manning Camp in your last picture. It looks like it has changed a bit since the 1950s. Did the old cabin collapse?