This is developing into a very interesting read, and more pics would make it even better. Always good to see how others have come up with ways to improve storage and organization. So here's my contribution in terms of my traveling arsenal when I'm in someone else's boat.
The first 5 pics are of a neat 4 compartment Plano box I found at Sportsmans Warehouse and started using a few years ago. I have one set up for steelhead, another for crappie/perch, one for walleye, and the pictured series for kokanee/trout. The box has a sturdy retractable carrying handle with two compartments on each side. The outside compartments have a clear plastic cover that affords a good view of their contents. To get to the two inner compartments you need to unsnap the two black keepers to flip the outter compartment out of the way. As you can hopefully see, there's plenty of storage space for a variety of "stuff".
The last 4 pics are of an old Bass Pro Shop tackle bag that I use to carry my pretied hootchie and spinner rigs, wedding rings, and other assorted items - scents, Gulp goodies, pliers, snips, knife, etc. etc. The 3 plastic boxes are Plano "Stowaway" 1-compartment #2-3731 Utility Boxes. The foam material I use to wrap my rigs on are cut down swimming pool toys called "Little Dipper" or "Noodles" that come in 5 foot lengths and 2-1/2 inch diameter. Cut em down to the length you want. They're available at stores like Fred Meyers, Walmart, Toys-R-Us and the like.
Well I can't see anywhere how to attach my pics to this post, so you'll have to go look at them in the "Members Albums" where I have created an album "BorntoFish01". Sorry for the inconvenience.