I have a kilt bag from Order of the Gael that has compartments for a variety of kilt accessories. It has pockets for sporrans, loops to hold belts, a special kilt hanger that also holds my Prince Charlie jacket and vest. In the bottom of the bag is a wide zipper compartment for holding hose. I simply fold them over once and they fit fine in there.

Sometimes I lay them flat and roll them like a knit tie (or a Swiss cake roll). That works well for storing them in a shoe or boot when I have to change from some other outfit into my kilt when I am away from home.

I don't fold over the top except when wearing them.

Andrew