I use a fishpond chest pack, but i don't out it on my chest as it has a shoulder strap as well, it is perfect for a short or long excursion. I can put 3 fly boxes in it that carry more than 100 flies each..you need more than that you have issues
..my net attaches the the should strap, the tippet attaches to a zipper and a hook provided, and there are many "pockets" for other things...clippers and forceps on zip pulls, whatever those things are called...it has a waist strap as well so you can give your shoulder a rest if you are out for a long time....