i did this...i got a strong cardboard box, got a piece of like 2 inch styrofoam
to lay on the bottom, pack all my stuff in like 4 strong black garbage bags, got 2 cans of spray foam from home depot and filled in the sides. thun a piece of styrofoam on top, seal it up and tape it up good.
worked great...felt like one solid piece, no moving around
i also went with ups shipping, weighed 65 pounds cost me 45 bux and it got from ny to ohio in 5 days exactly....pm me with any questions