I just want to add to this... For those of you that have thought about going to some sand dunes but have never been there, It is worth every penny spent and every minute the trip takes. There is nothing like riding sand dunes. It is deffinatly something that everyone should be able to experience and something you have to do at least once. I've been to Glamis, CA twice so i'm a little spoiled when it comes to dunes but I would love to make a trip to either OK or there are some huge dunes called Killpecker Sand Dunes in WY.
If I was to plan a dune trip sometime this late fall, winter, would there be anyone on here that would be interested in going?? I could do a Ok trip or a Wy trip. If we can get a few people to go it really doesnt cost that much. Just an example: 4 of us went to Glamis and it only cost me about $250. Even when 2 of us went it wasnt more than $300. I would more than willing to organize a trip, i'd love to get back to the dunes.
Heres the link again to the Glamis pictures... they dont do it any justice though...
http://s287.photobucket.com/albums/ll152/68fatrat/Glamis%20Pictures/