fall is an amazing place in AZ. fortunately for us, we can camp anywhere from 800' at the colorado in Yuma to 12,637' on humprheys.
a good compromise would be perennial stream, 6000 elevation, low chance of traffic noise.
any number of areas would provide those 3 requirements.
id say just to keep things fair, easy to reach (via passenger car) and centralized in the state, we should do West Clear Creek.
Maxwell trail is short at .75 mile but we can explore up and downstream, fly fish, luxury camp and have a hella good time with very little effort.
that is my 2¢