Maybe it's an age thing, but, I've tried fanny and sling packs and still come back to wearing a vest when I am trout fishing. I still have my original Stream Design which was my first real fishing vest. The first one I made out of altering one of my jungle fatigue shirts. I do have a waist pack that I bought from Recycled Waders that I use when warm water fishing and our annual trip to Florida.
" If a man is truly blessed, he returns home from fishing to the best catch of his life." Christopher Armour