I think that is a great idea!!! If the resort is going to charge you that much, why not spend around the same amount of money on something that one of your guest take home as a great reminder of your wedding.
I dont know where in nj are you at but if your somewhat close to Newton you should try Chrissy O Bridal. Their webstore has dresses for $40, i would think they would let you come in and try them on and take them right home.