Unless something has changed you should have no trouble doing this. We had rooms 2 years ago through a timeshare and we put all 19 of our tickets on our KTTW cards. Only problem we had was some our tickets (bought months in advance) were not being picked up when they scanned them, but they ended up just replacing those tickets and putting the new ones on our cards. I believe you can do it either at the resort or at any guest service location. We did ours at the resort.