saddlesores

bikepacking? do you mean cycle touring in general, or specifically frame bags/no racks on rough single-track?

for my anecdotal data point, standard touring only: 2-bag/4-bag/trailer, on and off road. touring shoes (road and mtb styles) with stiffened soles, flats with pins and toe-clips. straps not tightened down. i prefer shoes stiff enough for cycling, but flexible enough for kilometer-long hikes to waterfalls, with no clacking noise from clips when visiting museums and cathedrals.

usually carry a cheap pair of flip-flops for showers in $3 truckstop motels and for wading across streams, and a light pair of sandals for moseying around towns in the evenings, allowing bike shoes to air out.