Generally, your dress isn’t in a travel box for very long helping to reduce wrinkling. Some light wrinkles may appear in your dress but there are some really quick fixes.
Ensure you hang your dress as soon as you arrive at your destination. I find leaving slightly creased items in the bathroom whilst having a hot shower produces enough steam to relax small creases. Most hotels have a laundry service, so you can request a light steam on your dress, or D.I.Y. in your room. Always check your iron on another piece of fabric to ensure there are no blockages and place a light cloth or pillow case over your dress to protect the fabric. Do not directly iron your dress (unless you have otherwise checked with your dress manufacturer) .