It seems they can do it with a 747 vertical stab, which is much larger and more unwieldy:
Yes but on this plane they removed wings and tail to put it on a barch from Schiphol to the Lelystad museum. It was not ment to fly again....
Removing the vertical stab is a pretty routine procedure for allowing airplanes to into hangers that otherwise would have inadequate clearance
In Everett probably anything is routine but I understand you need a special bay and tooling to pull a trick like that.
Never heard of a stab routinely removed, except in case of damage but certainly not to save some hangar space..