Although Steve and I may disagree about hanging a kilt, we agree with shipping technique. Fold in half lengthwise, then half the other way and put it lightly in a box that will accommodate it. Some of mine are, well, large (6'5" 275# ---me, not the kilt). Some I have shipped for various reasons have required a slight variant of first fold thirds and second fold half to get into the box. But the only time I "squeezed a kilt into anything I though might be borderline small was when I knew it was only going to me in that condition for one or two days. Any resultant incurred creases were quick to clear with hanging and or steaming.

When sky travelling (flying) I do roll my kilts, but using an entirely different technique. I travel with my kilts in a "Skyroll", a combination rolling carryon-garment bag, that has the kilts hung in the garment bag portion which is then rolled around the central "box" and attached to it. So in essence no part of the kilt has any 180 degree folds added to it during packing. I can carry three or four kilts (tanks) in it if I remove the hangers and stagger the waist and fell portions of the kilts (needed hangers go inside). But then when flying it is unusual for the kilts to spend more than 12 hours in their packed state, unless it is an overseas flight.