I NEED SOME SERIOUS HELP WITH MY SWEET 16

I am having a huge party with family/friends...my theme is cinderella and im planning on getting a puffed out dress to go with the theme...my party favors are going to be glass shoes and the center pieces are going to be castles...i live PA but the hall is in New Jersey do you think thats going to be a problem for my friends? Im also having trouble finding the perfect dress so if you have any ideas where i can look please let me know thank you and please help me soon!!!