Only one call for a rear mech?
Gloves, i know what you mean about a bit of dirt, but 3 words
puncture, dog, sh*t.
Spare pads, clips ,springs bolts to fit them, never mind wearing them out, i’ve seen the braking material come off the the backing, pads just leave the bike, as if by magic.
tyre boot plastic milk bottle carton, cut a rectangle out if fact cut two, you can enjoy the smiles from random strangers when you give them away then.
I also cut one up once to make spacers to re mount a mates front brake after the bolts came lose. worked well.