This humble Allen may not look like much but it will go on anything. I have had mine for 20+ years and had it on fullsize vans, 300ZX, Taurus, Windstar, '72 sedan deville, and I have put on almost anything you can name for customers.
http://www.allensportsusa.com/products/102DB
Personally I think my Windstar is the best way to transport a bike. But I would rather fiddle with removing a wheel than have my bike exposed to whatever.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk