Yes, they offer a AAA discount, and I think it is usually the best discount except for AP rates. I called and had the AAA rate applied - I don't know if you can put AAA in the code box online and get it to work.
I did find for our dates (July) that there was enough of a savings for a three-night stay to upgrade to an AP just for the discount. The AP rates were more than $50 per night better than the AAA rates - FYI. I think my PBH rate was 258.xx with the AAA discount, and it dropped to 199 and 179 for our dates with the AP discount. If you are just staying one or two nights, the AAA discount is probably the best. The AP rate code is APH if you want to compare prices for your dates.