You do NOT Have to turn everything over to AAA...just because you booked a package with them doesn't mean you have to let them do your ADR's or any special events like
MNSSHP or any tours. You can still call yourself and book those as well as making your own ADR's (which is what I did when we booked through AAA. I wanted to make sure I got what I wanted so I did it myself).
What you can't do is make payments online, or call Disney and make a payment, or access the reservation online because it is actually in AAA's name, not yours. All payments must be made to AAA, who will pay Disney.
So...if you want to plan and be in charge of dinner reservations and such HAVE AT IT! For me that is almost as much fun as going! (Planner here too!)