I live on the north facing side of a mountain here in the Shenandoah Valley. More than once I have left my house in calm weather only to arrive at the local hardware store with the winds in full gale I have yet to buy a kilt pin. I will do so when I order my new SWK after tax season. I use a large safety pin, hidden of course, on my UK to keep the apron closed. It works quite well
As a side note, I keep a 5-gallon bucket of road salt in the back of my Nissan. It doesn't take much to give that little machine some traction. The bucket allows me to remove said salt easily and apply it to slick roads should the need arise.
Don't drive like my brother