In November, 2004, the layout was packed up for a second interstate move since I began it's construction.  To protect the layout during a move, I built a wooden crate out of 3/8" plywood and 1x2s.  When I originally constructed the crate, the layout did not have the masonite facia, but I knew that I would be installing it, so I designed large enough so that the layout would fit when the facia was added (I had to add 1/4" to each dimension).  So when I packed up the layout this time, it still fit.
 
I first built the six sides individually, cutting all of the pieces, and then applying the 1x2 framing to the plywood with construction adhesive and short wood screws.  I then put the bottom piece on the floor, and set the layout on top of it (without attaching it yet).  I then put the sides into place around the layout, and attached the four sides to each other by drilling pilot holes (to prevent splitting the wood), and installing drywall screws.  I then attached the sides to the layout itself by installing screws through the frame of the crate into the 1x2 frame of the layout itself (see the picture below).
Once all sides of the crate have been attached to the layout, I set the top piece in place, and attached it with more long drywall screws.  Then, I lifted the crate off the bottom piece (which wasn't attached yet), and set it on it's top, so that the bottom was  facing up.  I made sure that all of the wiring and plugs were tied down and situated so that they wouldn't get pinched, then set the bottom piece in place, and attached it with more drywall screws.
 
The result is a crate that is stiff and strong (I can stand in the middle of the crate, and it supports my weight), and can travel or be stored on it's bottom, side, or end.  It came through the first move in perfect shape, and I expect it to come through this move in good condition.  Well, I expect some foliage to come loose this time, but that can be easily repaired.
 
I will report on the layout condition when I unpack it, which isn't expected until after April, 2005, unfortunately.