I hardly wear a vest but I fish mostly for steelhead and all I need is one box of flies, tippet or leader, nippers, hook file, tip wallet. All of this will fit into the pockets of my rain coat or the upper pockets of my waders on those rare occaisions when I don't need a raincoat, nippers and hook file are on a lanyard. Oh, and in the back storage pocket of the rain coat is a ziploc bag with a partial roll of tp.