I totally understand. I'll just call a friend, and he will be there for me in moments. Like your nemesis, Arthur Itis, I also have a very bad back as my nemesis. I could fix the flat at home on my bike stand. No bending needed, because rotating my back around like a twist-o-flex watch band trying to remove a wheel on the road, I'll be in trouble for sure. Maybe we should look into those puncture proof solid tires.
I don't fancy those solid tyres; my Schwalbe something-or-others seem to be doing sterling service on my bike, and when I take the bike in for a pre-summer check over I'm going to discuss slime and CO2 cartridges with them, as a get-me-home strategy.
But so far I am VERY happy with them; I ride on tiny country lanes, rough stony canal towpaths, semi-surfaced tracks through woodland and worse, as well as suburban streets and shared pavements. I've just come back from 15 miles exactly in and around the mosses of West Lancs incorporating rough to not quite so rough canal towpaths, tiny country lanes liberally plastered with the fertile alluvial (I think that's what it is) earth of the drained meres and LOTS of water ... with the winds blowing unimpeded across the land I was in bottom gear, pedalling
hard and barely going fast enough to stay upright. But going back was a different story, it was lovely! This little folder is giving me so much pleasure.
