I knew a girl who worked in costuming, it all depends on the location, not to put a downer on you, but my friend worked at Epcot, and it was just SO boring, you would work at the register and scan in and out costumes, pretty much doing that and hanging up and organizing costumes that are washed etc.
OR you could be in costuming at the parks, to help characters get ready, work under the MK in the tunnel, who knows!
thats an odd role, not many people had it, I just happen to know someone! but yeah totally boring she said,and would have loved to had another role! if you can and don't feel up to doing the costuming , see if you can get out NOW before you start your program its harder to get out or even get out at all , after you start ur program!