I have a son who is flying in later in our trip to join us. He will be doing parks 3 days - hopping. I have 2 pre-2005 hoppers each with 1 day on them. What would be the best way to use those to get him 3 days hopping? Use tix as is and buy a 1 day hopper, trade in those two tix towards a 3 day hopper or something else? Suggestions please.....