Airing it out is pretty important IMHO...the top of a cedar chest is a perfect place to lay it out for a day. As a bachelor to the core, the "airing out" procedure is second nature...I can get a few days' wear from jeans that way , and the #1 way to prevent festering dirty sock piles is air the suckers out before tossing them in the hamper. Doing the same with the kilt is just habit. Don't forget to separate your piles by "ripeness" .

As a matter of fact, my kilt is from Robert...I either fold it like MoR mentioned and toss it over a chair if I figure I'll have it on again soon enough, or roll it as Robert describes and lay it in the cedar chest. The latter is certainly less stress on the material, and takes up less space...I learned about "shoulder nipples" when I started doing my own laundry in college, and the last thing I want on my kilt is...uh..."waist nipples"?

-Sean