In November I made a short journey to Italy. I preferred the train so I did Durham (England)->London->Paris->What you can see in the photo is: a Bronica SQ-A with Zenzanon PS 80mm f/2.8, vertical viewfinder, strap and 120-film back; a Manfrotto table tripod, a Minolta light spot meter, my Nokia phone, a wonderful Fabriano notebook (great paper, much better than Moleskine), a micro pencil, some film, a short shutter-release cable.
I was surprised myself to fit a medium-format kit in a small bag. It worked and I came home with not a single roll wasted due to light leaks or other camera malfunctions.

