A grandchild, niece, nephew, etc. to do the bending, lifting, and twisting into a pretzel.
Seriously, I try to only carry tire changing tools, a shovel and machete for when you need to dig a hole or cut brush, plus 100 mph tape, vise-grips, multi=tip screwdriver, and a pocket knife as I am moving down the road.
Supply items like wire, bulbs, glass, screws, etc. I buy after I get to a camp ground or home. If I can get it home I can fix it there.
Otherwise I would be bringing sheets of plexiglass, plywood, paint, rivet gun, staple gun, air compressor, welding machine, electric saws, drills, sanders, soldering iron, pipe wrenches, etc. etc. All of which I have carried in years gone by ;) but have learned to leave at home.