I want to mention the temperature issue since no one else has yet.

What color is the container? How hot does metal sitting in the sun get where you are? I'm in the Seattle area and two summers ago, we had some 100+ degree days which is really rare around here. I had the fortune of temporarily storing some electronics outdoors for a bit in an area that received direct sunlight for the second half of the day. Black computer cases. On our 104 degree day, I noticed the plastic on front of some of the cases had warped. On our 108 degree day, I measured the temperature on the surface of the cases at 170 degrees. So while that didn't warp the plastic, the cases with metal directly behind the plastic did warp the plastic.

So, just be very aware of the potential temperatures and store your electronic accordingly. Possibly a good few coats of paint designed to reflect heat (the kind used on the tops of school buses) would be a good idea.