The brochure shows “bedroom vent fan” standard. Just make sure it is the Fantastic Fan model you would like. When you start smoking the bacon or whatever. That is the fan you want to turn on high as the alarm goes off, been there, done that, many times.
Pay your money and join http://www.afnash.com , great folks. Also go to their annual get together at the factory if they still have them, lots of fun.
I dragged a 2004 22H everywhere except your neck of the woods and only had to put new tires on it.
May you have many happy miles with your new trailer.