Flag Mounts - $95 each
The work on either driver or passenger side.
It's a cheap way to show your patriotism, or love for sports, or company.
www.trac-top.com
Yakima has a good option. The crossbars snap in when you need them, and come off really easy. I only have them on when I moving the kayak around. I would highly recommend them.
I had some really bad shaking for a while. Turned out my tires worn down to a point where they weren't balanced anymore. I just ended buying new ones and problem solved.