I went up there a few months ago when I was visting GR. Rented one of those red JK's and blasted and bombed through the dunes. I didn't think I was going to like it, I'm used to the rocks out west, but it was fuuuuuuuuun. Managed to get a little air in the rental Jeep, and almost managed to get it high centered on the top of a dune. Can't wait to go back.
Nice looking Rennie by the way!
And awesome user name. Go Wings!!