That last prophecy has fulfilled itself! I visited Owen Robertson while in FW, and we powered up his 11/34. He showed me a few things -- how to load RL01 packs, where the power switch was, etc. -- and we proceeded to play with the machine. There are problems with the RSX-11M pack he has, so I loaded up an XXDP+ pack. After printing and reading the help file, I experimented and was able (after some trial and error) to -- drum roll, please -- load UPD2 and create another bootable pack with XXDP+ on it!

It's too bad we didn't do this a week sooner. The scrappers had just finished destroying what was a very nice PDP-11/60. I at least found and took the unit numbers from the RK07 and RP0x drive.