I'll add my 2 cents worth and move this up again.
I've had several jobs done at Jackson Center. One was a minor sheet metal job, repairing a tear over the door. Another was a major sheet metal job, replacing two or three big panels at the front where they had torn away from the attachment at the floor.
I was very happy with the work done with both jobs and would highly recommend the Airstream Factory Service Center, particularly for this.
If you are like me (and another Airstream owner I have talked to) you may find Chris at the factory to be difficult to deal with. Unfortunately, he is the Service Writer, so he is the liason between the customer and the actual mechanics. In spite of that, Rick, the Service Manager, is very knowledgeable, as well as a straight shooter. He will tell you what's wrong and what needs to be done in clear terms, and also give you an idea of other options, if any. You will have to get past Chris to talk to Rick, but it's possible.
I typically use the factory for any service I can't do myself, but they are only three hours away from me. I could probably find someone closer for plumbing and similar work, but I know the factory service will be fine. For exterior sheet metal work, I would not consider any other shop unless I had some glowing recommendations from other knowledgeable owners. The factory sheet metal work is top notch.
2012 New Horizons Travel Trailer (formerly an Airstream owner)
2008 Dodge 2500 diesel with Equal-i-zer hitch.