If you do need to pack the kilt, carefully lay it out, full length on a table (or floor) the roll it up, keeping the pleats lined up. (not as difficult as it sounds),

Then beg, buy, borrow, or steal, a half hose form your wife/girl/firend/SO, and roll it over the kilt. It will then pack very easily, and then when unpacking, the kilt will have no wrinkles.

Of course if you wear it, you will have an extra 4 to 5 lbs to pack into suite case.