I don't know about Iowa, but I got AP's at AAA at a discount. I saved almost $100 on 3 of them, then saved an additional $250 off my package through AAA. I still had to purchase a 1 day base ticket for each person in my party because we are usning the Basic
DDP next December, but that knocked an additional $623 off my reservation which paid for half of my AP's which will allow me several more trips without the added expense of tickets for each trip.
Suzanne