Two cargo bars and some bungee cords. The wings and fuselages stay put. I face them forward, nose to the cab. My planes and I go about 10 miles to the field at 70...uh...the speed limit.
If something starts to flutter like an elevator or a rudder you can wedge a thin piece of cardboard in the gap.
Cargo bars like these:
http://www.northerntool.com/webapp/w...70_12114_12114