Stiggs and the two bots may vanish if the Lone Wanderer leaves the crawler before they have all left, and they may all "get stuck" on equipment in the Adams storage facility.
"Well, just above us is a deathclaw research facility. Most of the deathclaws are out fighting, but there might be one or two left. There are also a bunch of robots in the facility, and they're all controlled through the mainframe. There are also some military types left but not nearly as many as there used to be."