I've arrived at Washington-Dulles airport. After looking at various options, my host kindly offered to take a large chunk of his day and drive me up here. It was a nice leisurely drive, although the Friday afternoon traffic away from DC may not be quite as relaxing.
It has been a wonderful ten days of travelling and seeing old friends. I'll have slightly less than a fortnight in Toronto to get my affairs in order before heading off on my next adventure!