As Joyflea noted, these Air Forums are an excellent resource in your learning.
I also like the Airstream, Inc website trailer archives. This page allows a guy to search on a year and then a model, e.g. 2015 models. That might work for you also.
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.