I wanted a camera handy that was set up for whatever shot might pop up by surprise...
I wandered TacCon with the Canon 5DS wearing the 24-105mm f/4L and Canon 5D Mark II with the 70-200mm f/2.8L around my neck. I had a couple other lenses in the bag over my shoulder just in case, but also in the bag was my EOS 1N with a roll of Fuji 400h. My last roll of Fuji 400h.
Knowing I only had twenty-something shots left on that roll of film really put the brakes on when and why I pulled it out of the bag.