Give your prom and party guests a favor that they'll be sure to use, like Mardi Gras night lotion. Practical favors are the best! Guests will appreciate receiving something they can put to good use.
Hand out "welcome" bags to your wedding guests. Arrange prior approval with the hotels you've arranged for out-of-town guests to stay in to allow you to place a "welcome" bag in their room prior to their arrival. Fill a Mardi Gras mask bag with personalized hand lotion, a Mardi Gras Compact Mirror, and Personalized Mardi Gras Key Tag in their bag. Add a few personalized bottles of water and mints -- your guests won't have to worry about having forgotten something during their travels.