What if your trip is by car? And what if you're going to take your time, and drive from the single-digit temperature fun of Chicago to the balmy deserts of the Southwestern United States? And what if you're going to take your time - every day in a slightly warmer place?
I'm thinking.... Pack separate, but closely related, outfits for 4 different kinds of weather. That way you're prepared for each warmer day, and at the same time the "relatedness" of the outfits gives you options for interchanging your garments to adapt to unexpected conditions.
A basic application of this idea would look like this:
When you start out, you're going to need to be warm, so a couple of layered jackets, and a warm scarf, will take care of you. ... View the Post