It will open and close with the draw bar installed, but it is difficult. So I do remove the draw bar as I'm opening the tailgate and insert it while closing.
I've only used this on the trail, just to be clear. I don't feel it's needed on pavement because my isolators are extended and very solid.
I did remove the tire carrier from the tailgate to cut the factory third brake light stuff off. When I reinstalled it, I used loctite on the carrier to tailgate hardware. It's 3-4 pages back from the end on my build thread I believe.
Hope that helps!
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Overall "build thread"
http://wayalife.com/showthread.php?26097-I-guess-it-s-the-quot-Super-Stocker-quot-build
DIY trail/tube door build
http://wayalife.com/showthread.php?24449-My-DIY-Doors