I’m thinking of something that’s around 5x8. What can fit in there? is it too small for most purposes on a longer trip?
I’m thinking that a cargo box organization system would be the way to go? Pick a box that has an interlocking stacking aspect to them from here (https://www.nytimes.com/wirecutter/reviews/best-storage-containers/) and off you go. Leave an aisle down one side or the middle so that you don’t have to unpack the entire thing to get to a single item. Maybe even a shelving system that’s sized to the selected box.