"-- I carry a spare tube, repair kit and pump (Presta /Schraeder combo). I don’t believe in CO2 because if you need more air, you’re screwed after the first use."

Exactly. Just yesterday, I developed a slow leak, but was able to make it home by pumping the tire at a few stops on the way. It was much more comfortable to be able to do the repair at home, in the air conditioned basement.