Well Scott, I think I have a really good memory for things, and I would say that where most of my stuff is stored is fairly easy to go through. It is a 10x10 room that has a dresser, treadmill and a nightstand taking up space by the door. My boxes are located in the back part of the room with a path to the middle. Most of the stuff is rolling stock(some O27 cars) and I have it blindly organized by box size. I have a few giant boxes(engines or big accessories) at the bottom and work my way up to smaller stuff.
I had taken out a bunch of the bigger scale engines(steamers) maybe two years or so ago because I was trying to find my S2. Well, I moved that and the other engines across the hallway into the other spare bedroom. I had thought I put the tender in there when I did that. In the process of moving all that I had damaged my Western Maryland boxcar(sprung truck broke with little effort hitting the floor).
So, I took that and the S2 to get fixed and maintenance done. The look I got when I explained how the Boxcar's truck broke was almost too funny as it had only fallen with very little force and only a few inches. They had thought it plummeted off a train table.
When I find the cars that go with the S2(should be easy to find), I'll pop the Western Maryland boxcar with them.