SoLA. Pfft.
The important things to play up are the Neo-Aztec culture with its regular little blood sacrifices and general air of creepiness. And the law in Aztlan is that if the cops harm anyone while trying to stop your PC, YOUR PC is legally culpable for their injury or harm. Which is a nice way of saying that the cops have no problems causing "collateral damage" to arrest and/or kill your PCs.
Aztlan's also running pretty high on being a "pro-human" nation, especially since it just won a war against a nation ruled by three great dragons and as far as most people know killed one of those great dragons, who was considered a war criminal and a terrorist. IOW, Aztlan's a pretty popular place. It's ruled by Aztechnology, and Aztechnology has the best PR in the world. Everything at the resort town is going to be geared towards making it seem like the greatest, best place to be in the whole world, which all that propaganda is pretty good at convincing you of.
Aztlan is a great sourcebook; one of the best ever. It's definitely worth getting.