To answer your specific question, yes - the package ticket for the person with the AP can be used later.
Thoughts on package vs room only:
Some offers from Disney (i.e. "
free dining") require that you have a package. If you're not using one of those offers, room only is, imo, the more flexible choice.
Packages require a $200 deposit with the balance due 30 days before check-in. cancellation fees begin at 30 days.
Room only requires one night's room and tax as a deposit. Balance is due upon check-in. You can cancel without penalty up to 5 days before check-in.
Tickets on a room only are useable whenever you want, and different people cam have different length tickets, or none at all.
Tickets on a package are generally not available for use until the day of check-in - which can be a problem for some people with plans that have them in the area prior to their resort stay starting. With a package, everyone must purchase the same type of ticket.
There is no price difference between a package and room only with the same components.
The only slight advantage a package may have for some people is that if you have to cancel a package, the tickets are cancelled too. With room only, the tickets are a separate purchase and cannot be refunded; but of course you can hang on to them and use them later
Room only gives you the greater amount of flexibility to do things the way you want.
Steve