I just got back from 4 days on the road with my current set-up. I'll update with pics later if I remember.
My wife donated a bunch of tupperware containers that were PERFECT for unitizing stuff: a tool box, a snack box, a medicine cabinet box, a tire repair box, etc... they all stack/ nest nicely in an Ikea bag so I can grab the one I want or take the whole bag out (handy for hotel nights).
Speaking of hotel nights, my pannier lids come all the way off and have organizers in them with more stuff (phone chargers, ear plugs, etc.), so I just grab the Ikea bag and the pannier lid and carry it into the room. The bike is parked with lid-less panniers. No fears break-ins or box damage, and I don't have fiddle with organizer storage. I use a half-cover which covers the open top of the panniers. Worst case, a miscreant throws garbage in one.
I have a big drybag that takes my tent, sleeping bag, pad, and a piece of tarp I use as tent footprint - packed in order (foot print on top, then tent, then stuff that goes in the tent deepest in the bag). That bag is roc-strapped across the luggage rack. I have a little 3-legged stool with a backrest that I use as my camp chair which sits behind the drybag.
Tank is stuff you need underway: hydration bladder, snacks, and glasses and a hat for stops.
Last sublime hack: we have a bunch of disposable, round, take-out containers with lids. They nest together and fit perfectly in a round dry bag. So, a few containers for food stack nicely in the dry bag, which is DRY, unitized, and easy to loft whole as a bear bag. As the stuff got consumed on the trip, I consolidated and nested empties, creating more space.
I love it when a plan works!