I think I found the ultimate solution today!

I was thumbing through a material handling catalog today
(www.randmh.com) and saw some cargo handling bars.These are bars made
to span the inside of a trailer to restrain the load from shifting.The
ones in this catalog were for large trailers (89"-104" wide) but a
quick internet search yielded several source of similar cargo bars
made for small pickups and minivans.


John Keith