My area has awesome dunes. You have Walden down in CO (abot 3 hours from me, here in Rock Springs, WY) you have Killpecker sand dunes about 20min from town, you have St. A's next door in Idaho, Sand Mountain over in Utah. This whole area has some great dunes, and they are all different. Walden is small, but my personal favorite. If you came out this way, you could crash here at my place. I have a big house here in Rock Springs, with plenty of room for guests.
Check out Dunereview.com for pictures and video of all the dunes lited above. All right in this area. I also have vids and pics posted from walden and killpecker in th images and video section.