B.D.
We just returned from there. We did not have the park hopper option (frankly the parks are big enough that hopping is not really viable) but your cards state that everything expires at midnight the last day of your stay so I am sure they are not valid anymore.
Plus everyone is correct - all adults need to scan their finger when using their pass so it is linked to that individual.
Since you're into saving money, make sure you cash out all of your snacks etc if you are purchasing a meal plan. Maybe take an empty suitcase for the return trip.