Just returned from my wedding and it was amazing!! Will be sure to post a bunch more info shortly, but I wanted to comment on the recent traveling with your dress posts.
We flew United and I went in with the impression that I'd be able to hang my dress in the first class cabin. When I got to the gate I asked the person at the desk and they said it was up to the attendants on the flight dependent on space and to ask them. When I got on the plane I asked the flight attendant and I immediately knew by the look on her face that there was a problem. She offered to hang it in the closet, but then showed me the closet... It was only about 4 feet high and maybe 6-8" wide. No way my dress would have fit in there without unceremoniously shoving it in, totally defeating the purpose. Luckily, although our flight was fairly full, there was miraculously plenty of space in the overhead bins. I was able to lay my dress out completely flat (there were 2 doors, but no divider between, so I took up 2 bins).
Meanwhile, my silk chiffon dress wrinkled anyway. The onsite wedding coordinators set me up to have my dress steamed, but we hadn't discussed when it would be delivered to my room. When I hadn't gotten it by the morning of my wedding I called and had them bring it right over, but it was still wrinkled!!! I almost freaked out. I called the wedding coordinator again, who was very responsive and they took it to have it steamed again (I believe they said the steamer is over at Azul Sensitori). It didn't come back perfect that time either, so I figured I'd just have to roll with it. And then I realized the best thing about the humidity in Mexico... within about 5 minutes of being outside, all the wrinkles just relaxed and disappeared.
So, my advice...
Forget the 1st class closet - unless airplane closets vary greatly, it will not be helpful at all!
Get on the plane early - be one of those people who rush to get in line to get on first. Stake out your space in the overhead bins and give dirty looks to anyone who comes near your bins.
If you get your dress steamed onsite, plan to get it back with plenty of time to see the results and do it again if needed.
If it's a little wrinkled, don't stress it!!! it'll probably work itself out. And if it doesn't, the location will be so beautiful and you'll be having so much fun that no one will notice!!
Let me know if you have questions!