If you have a membership, you simply give them a call, tell them you'd like maps of the areas you'll be travelling through, give them a couple of days to compile the info, and they will give you information regarding that.
To my knowledge, they will not just randomly give you all the maps you want, because people would abuse that.
edit:
Please select the publication(s) you are requesting, and then click "Continue with Order" at the bottom of this page. To select more than one publication, use the CTRL key while selecting.
Your order will be mailed to the member at the address you specify on the next page. You should receive your order within 10 days. If you require your Publications sooner, please visit a local AAA office.
You may select up to 10 publications.
Not sure if this applies to going and picking things up. I know they ask for your membership card/info when you get maps, so it's likely they keep a record of what you are getting.