Disney transfers

[HillPete]

I'm thinking of using the new magical journeys (magical express? I can't remember the name of it right now) to get to the WL from the airport in September. I would still like to rent a car from the car care center once we get there. I'm thinking that I can get a smaller (cheaper!) car because we won't have to schlep both the stroller and the luggage at the same time. has anyone rented from the car care center? Are there any deals available? I have AAA and a BJ's membership that both offer rental discounts, but I'm not sure they honor them at WDW. Any thoughts?
TIA,
Hillpete