re: Backpack or satchel? Which do you use?

I still use the same leather courrier's bag I bought in Italy over forty years ago. I guess you would call it a satchel or a mailbag.

I had an Uncle who was a postal carrier in Dallas 20s-50s who left me his leather bag. I've seen one or two similar to it on eBay for a lot of money ... get one if you can find one.