Try the train again.
I have helped friends build crates before. Take a skid, nail some plywood around it. some 2x4's in the corners for support, and you're good to go.
Mark what side you put on last. It makes opening it easier later
Depending on the size of the items your sending, you can add shelves into this box too. When you call them to pick up the crate, be very specific that they need to bring a pump truck, and a truck that will suit your loading conditions (if your doing this from a driveway, they need a lift on the truck)