I wear my hiking skirt to sleep in too. Especially if I'm hiking with the scouts. Having a hammock means I don't have a place (inside a tent) to change in. Plus I've found that when I get back up, the skirt (kilt for you guys) just falls back down where it belongs. Now if I'm wet (it's raining) I'll need to get changed out of that skirt. Then I'll just pull on some shorts while wearing the skirt then remove the skirt. Hang it to dry. Put back on in the morning.