Welcome to the forums, WhatisHip!
So you need the right truck for your newly ordered 23’ Safari…
And live in the mountainous Pacific NW.
Well, I can tell you that I am very happy that I chose the 2006 F-250 Super Duty Power Stroke Diesel with crew cab, Tow Command (integrated brake controller) and built-in tow mirrors.
I feel very secure, comfortable, and happy towing my 2007 23’ Safari, while the truck is loaded with gear, passengers, and two dogs, up and over our Pacific SW mountains!
You’ve chosen your Airstream dream well… Congratulations!
I highly recommend that you at least test-drive a new F-250 PSD before making a final decision for that right truck!