I'm a Fly Fisher
Am thinking something like this might work.
I am a fan of tool rolls, I haven't tried this but.....
You get the idea.
Found it on eBay, Fly Fishing Tool Roll
I like rolls too, carried a good one with me when I rode the motorcycle to and from the dragstrip the first 7 years I raced, was perfect to haul in the pack.
This one is cool and could make a long haul version of this, more size and capacity than needed for this small version.