To answer your question....If the wrinkle is in the apron you don't need an iron, a press or anything but a small steamer. These can usually be found in stores like WalMart, Zellers, Target and others of the like.

Hang your Kilt as described in my tutorial "How to hang your Kilt" and pass the steamer down the aprons. As the heat warms the Wool you will find the wrinkles fall right out. If you need a light downward pulling on the Hem will help but take care not to distort the fabric.

I have been using a steamer for over 5 years now. When traveling, in the Kilt Shop for touch-ups, and on my own Kilts at home. I heartily suggest every Kilt wearer have one.

A comment.....Some advise not dry-cleaning Wool Kilts. The thinking is that the chemicals gradually remove the natural oils and lanolin from the Wool.
Hand-washing a Wool Kilt is best. It takes some time, especially to dry but is gentle, requires no re-pressing, and doesn't cost a thing to do.