I make my own lanyards, with monofilament inside 1/4"
clear vinyl tubing....so the mono can break if you
snag yourself. I drill 1/4" holes in four champagne
corks and thread them onto the tubing, in between
big wooden beads and large wire clips (clips
come from a lure-supplies place, like Lakeland
in Minnesota).

Other online places sell retractable clips,
designed primarily for ski passes. They work
well for clippers and hemostats.

Flies go in a shirt pocket. Sometimes I use
a day pack--in addition to the lanyard--but I never use a vest.