If you are flying, you can usually make arrangements with your airline in advance. First-class cabins have large "coat closets" that can be used for bridal gown storage. If they do not allow you to make these arrangements in advance, let the check-in attendant know you are carrying on your wedding dress and they can make special arrangements for you (like put your dress in the flight stewards closet). If your plane does not have a first-class area (on airlines such as Southwest), it is highly recommended that you package the dress in a large box and ship it to your destination in advance, carefully packed in tissue to hold its shape. Regardless of the method you choose, look into having your gown pressed at a local cleaner upon your arrival. Your hotel's concierge and/or wedding coordinator can help with this.