If you've got the coin, the Racer's Edge 1/8 hauler bag rocks.
I use mine for 18th scales. The drawers are hard plastic, not cardboard and it has wheels and a carry handle. The bottom drawers can hold two transmitters each, the middle drawer holds my parts box and the big drawer I can put 5 18th scales in. The top has elastic loops for holding all your tools. It's one of the best investments I've made because I can carry everything I need for a night of racing for me, my son, and my niece.