Since the 7 day hoppers are no longer a valid ticket, guest services will rectify that situation for you.
but, do go to the gate, to attempt using them.
if they won't scan, TM's could let you in and tell you to handle the upgrade sometime while you are in the park that day.
or it is possible that the TM's will direct or escort you to guest services inside the park.
i was escorted but let in to the park past the gate.
i can't say it any plainer that it is best to not do the exchange at guest services outside the park.
without using them before exchanging them for an upgrade, they will reflect an amount that you paid in 2008.
if the system has changed since i did the exchanges, i don't know as i have not read any posts for those upgrading outside the parks.
don't worry about this as passes never expire.
mine had expires 2030 on the back of them which UO told me, it means no expiration date.