I can show you what I do in that exact situation. If I can find the photos. Anyway, I got a front hitch arrangement that bolts on to the tow hooks. Then I took two of the cheap "bed extenders" and fabricated a forward arrangement to have the kayak over the hood, out front and used a single roof rack to hold the back. If I didn't have the cover on the back of the truck covering the forward pockets, I'd have made something for that to come up over the cab instead of using the roof rack. Bodiac makes the front hitch bolt on.
I've had thoughts of a brace from the vertical to the horizontal member to eliminate that some but as long as it's secure to the rig, it's not doing anything but reacting to the wind currents under it. It's not violent. I thought the brace would cause it to be more of a jerk action and didn't want that. With a head wind it starts that action under 70mph. 
