My daughter and I took a trip in December. Dad was deployed in Iraq and we were celebrating our birthdays. I bought the 6 day military park hopper. Well, my hubby is home. He and I are going to Disney in April. Can I use her unused day and extras and trade them in for an adult? I know I would probably have to pay some, but wasn't sure if this was possible. I hate having passes sitting around and wanted to use them before purchasing more. Thanks for the help.