anyone know what copies( year and months) have airstream articles in them
I can't give you the precise references, but the information would be easily accessed at your local public library. Ask for The Reader's Guide to Periodical Literature
for the years that you are interested in checking. Then it is a simple process of just looking up "Airstream", and/or "Recreational Vehicles". I suspect that there would be more articles in the 1950s, but I do believe that there were at least a few in the 1960s.
Good luck with your search!