I was really hoping for a solution to shipping my dress, and carrying it on as-is (as you can see in my sig, it's
huge).
So I talked to the owner of the shop I bought my gown at, and I asked about using a Space Bag to shrink the size of the carry-on, to make it more manageable. She said it would work fine, especially if I had plans to get the dress steamed anyways...
I tried it out tonight with my crinoline---and it worked wonders!!!



For $12, I got two extra-large Space Bags at Target----and it will save me shipping costs two and from Vegas.
Hope this tips helps you guys too!