AAA would mean highway. All topographic maps should be from USGS. It says in the rules that Event Supervisors are supposed to provide ALL maps for the event, so I don't think that this should be an issue. If people accidentally brought different editions of the AAA maps, an answer for a question on population would be completely wrong. I would be disappointed to find out that the Event Supervisors at nationals weren't buying the same maps for people to use.
Expect them to give you the maps there. I really think that they will, but if they don't, appeal.
My SHMS Team Results: