This topic has also been discussed in-depth in several other threads -- which is when I first even THOUGHT about it. ugh. But it sounds from those threads as though most airlines are veryeasy to work with and many even give you a complimentary upgrade to First Class when possible when they recognizt the rbide and groom.
I am going to take a personal steamer with me (the small handheld kind) and my Mom is going to work out wrinkles that may have taken shape. But, if youhang the dress in a friends/family room upon arrival, the wrinkles will likely fall out on their own.
I have a sheer overlay on my dress, along with the crinolin, etc ... and it's all wadded up in the garmet bag, but whenever I take it out to try it on, it's hardly wrinkled at all.
So, I think as long as we are as careful as possible with our dresses, that we will be pleasantly surprised -- even if they do have to go in the overhaed compartments.