Kim I'm sorry that I cannot help you in your search, but maybe others will. But your request brings up an interesting subject.
How to trace a gone but sought Airstream.
Was there a number (probably red) upon the front top of the trailer?
Do you know that number? That would only help if the present owner renewed as a new member of the WBCCI group and requested the same number. Or maybe they (the WBCCI folks) ask if there was a current number shown and maybe they record that info. Of course geting that info from WBCCI may be hard or impossible. And it is a long shot that new owner has joined and registered yet.
Maybe the Oregon dept of transportation or motor veicles or whatever yall have out there could be of some help.
I suppose your mom signed over a title of some sort to the new owner. But whether they then re-registered with the state is another matter. Do you have anything with the serial number?
But if the new owner was from out of state you'd be searching in vain I suppose, but maybe not. Worth a try.
Also I have to admit that I am very curious what you might have found that you are going to all the trouble to re-unite with the new trailer owner. Please tell. Did you consider taking the trailer? Did you share it with your parents when younger? Tell us about it if there are memories please.
And lastly give me a clue regarding your nickname kimsews, ... do you? I need some sewing advice that concerns my Airstream and don't recall seeing any one here who speaks often of sewing, except a guy named smiley.
BTW I guess you ran a google on the name, I did and only found one entryPaul Gamroth class of 2001North High School Colmbus Indiana
firstname.lastname@example.org Hope the email address pans out for you. Gotta figure that Gamroth is not a very common name.