We will be at DL in early October when my girls will be 3 and 6. They are both looking forward to dressing up in Princess costumes - but seeing as we only have one (and it's looking a bit old from DD1 wearing it so much) I want to get them some new ones. But I don't know whether to buy them here before we go or buy them at DL. Can anyone tell me how much they cost at the park?? Thanks.