You know, as a kid and growing up, I had every potential to become a hoarder. Then I moved out of my parents house to the big city - but my room mate and I only had a small van to carry both of our belongings, so I had to leave most of my stuff behind. And in spite of my apprehensions, it became a freeing, life-defining moment.
Since then, I've moved by bus (Greyhound type), by car, and, more recently, by plane as I mentioned.
I've located a pic of that last move - that's all we took with us (including two cats in their carriers):