The only way to reduce the wind is going to be putting a vent of some sort in the back. If only the rear window would go down, like in a 4 runner all our problems would be solved. That is really my primary motivation to remove the back hatch and doors for the summer.

I was also considering a roof vent in the back like in a conversion van.

Like this
http://www.amazon.com/gp/product/B00...VF3RQX3YV635HV