Like B_rod said, cushion the cross members with thick pool noodles, transport the kayaks upside down, use regular straps (not the ratchet style), and run bow lines from the front bumper and you'll be OK. You may get some deformation, but that can be remedied by sitting the kayak out in the sun when you get to Colorado Springs.
"Water is life's matter and matrix, mother and medium. There is no life without water." -Albert Szent-Gyorgyi
"No man ever steps in the same river twice, for it's not the same river and he's not the same man." - Heraclitus