Back in Phoenix, thought I'd post an update. The back yard at Bob's is, sadly, almost completely gone, with most bikes removed and scrapped. I had my eyes on a 350F with a complete and intact set of carbs, but they are gone. There are still quite a few bikes back there in the Honda seciton, but maybe 1/20th of what was there before. A few 750s with roundtop carbs, a 750 Hondamatic, a later 550 with decent exhaust. Saw a CL160 or maybe CL175 tank in really great shape just sitting there on the ground, but most of the twin stuff was in the middle of the yard and that whole section is gone.
They closed the third yard, and brought some of the stuff into the parking lot (where there is no longer anwhere to park, but parking is out front) and the first yard. The first yard is harder to navigate because there's more stuff there, and the SOHC stuff is now behind some of the other stuff from the second yard.
I was bummed when I saw that second yard and especially when I saw that those 350F carbs were gone (although I am pretty sure there are a few more sets in the carb bins...). Because a tech company is moving in, the land is worth millions now apparently. Dunno what the longterm plan is in terms of staying open and what will remain. But at least the dude who sells hot dogs with Rat Fink painted on his cart was still there.
*Forgot to add: they are still acquiring bikes, including through insurance companies totalling bikes. And they had just received 6 KZ900s/1000s, including at least one Z1...