IF - and that is a very large IF.....if the package details are the same as last year, then yes, all you would need to include in your package for park tickets is one base MYW ticket one day ticket per person.
AND yes, those tickets would be on your room key.
AND yes, if you never use that room key for park admission, they are then never activated and they then never expire.
i did this very thing last year(used my APs for park admission during our enitre stay) and plan to use these unused tickets as credit towards the purchase of new AP's this year. (could not use the credits towards AP renewal, but only towards new APs)
the only stickler is about letting the 2 year old use them when they get old enought to need park admission....because the tickets have names on them would they not be able to be transfered.....OR.....because they never were activated, and therefore have no finger scan associated with them, could they be used by someone else???? that is the big question. maybe someone else here can answer that.