From what I have been reading, it is better to use older tickets for admission than trade them in towards new ones, as apparently you only get credit for the original price of the ticket. Has anyone used older tickets recently? If so, how do they handle parks not mentioned on the older tickets? Are they only good at the parks listed on them? I have some from the late 80's which only list EPCOT and MK, and some from the early/mid 90's which naturally lack AK. So would none of these gain admission to AK? Would the EPCOT/MK ones only allow entry and hopping to those two parks? In addition, some were children tickets which are no longer needed as such. Can an adult somehow make use of them? Thanks for any insights.