Got back last night from a 10-day trip (Boston to Phoenix to Newark and back to Boston) with just the one bag.  Hotel laundry is super easy in Arizona - everything's dry in a couple of hours. 

I was a bit nervous last night boarding in Group 5 (the last group to get on the plane) but did find overhead space for the bag.  As I mention in the book, the great thing about this way of traveling is that if you absolutely must, you can stash the bag under the seat in front of you. Not a lot of room for your feet but it can be done.

So check it out - cool pic of oranges in a coffee shop in Jerome, AZ, a shot of Arcosanti (architect/philosopher Paolo Soleri's weird and cool acid-dream habitat vision), and the outstanding peak of the trip - a hike up Bear Mountain near Sedona.