The rear ramp doors flex and twist quite a bit, thinking these would take some serious engineering to allow flex around them and / or box in really well to avoid the glass flexing / breaking.
They will keep a lot of extra sand out of your face, may give a lot of feedback depending on your steering rack ratio, I would recommend something like this http://www.pacificcustoms.com/ac498700.html
First time ever camping in the small dunes, asphalt from the road must hold heat LOL We were reading reports of 19 at night and 40's during day so we were pleasantly surprised. Did not seem near that cold We left on Fri, dunes were TORE up. Time for some wind. Had 1 injury in camp, xp900 on side and stock breather spilled hot oil out of reservoir onto drivers arm. Going to re-route...
Nice memorial Cory, first time I met Clark he was a little guy, we just pulled in to Dumont when we used to camp deep in the finger dunes, rolls straight in the motorhome, opens our ice chest and asked where the sodas were. Full of life for sure