Well I work for an airline so I can tell you to CARRY.YOUR.DRESS.WITH.YOU. The flight crew will be more than happy to put it in the wheelchair closet. It's pretty unlikely it would get lost if you packed it in one of those fold-over garment bags, but that just means wrinkles and more stress. Just don't forget it in the closet when you deplane! As far as your welcome bags, it might be easier to ship, but you should look at excess baggage fees (and make sure you stay under max baggage weight) with whichever carrier you are flying. Fed-ex is really expensive so it might just be cheaper to shell out the extra fee to check it with you. I know what you gals mean about the DIY projects, I am a master procrastinator so I already know I will be doing everything at the last minute. I work better under pressure.