There are some practical considerations that may make wearing a reception dress a smart option. If you've invested in a valuable gown that you want to maintain in pristine condition, keeping it away from food, fingerprints, fumbling feet and spilled beverages is a good idea. When you're planning an outdoor reception, a white or even a pastel wedding dress can become a dirt magnet and start to look soiled before the afternoon is over. If you have a reception dress in reserve, you can choose a climate-friendly garment, too. If you're getting married during a heat wave, that can be a definite plus.