You can stick it in the original box, others use a carrying kit
http://www.kustompcs.co.uk/acatalog/Carrying_Kits2.html
I just stick my machine in the car, cushion it with sleeping bag/duvet/bedding/pillows etc, and just secure it reasonably well with other things and its fine. Its what ive always done when lanning, and my machines always stayed in one piece.