1940s Trailer - home of Paul and Dorothy Kinnick, at Pete Smith farm home:

Dorothy and Paul Kinnick, in front of their 1940s trailer home.

Fifty plus years later, here is Harvey the RV, the "trailer home" of Annette and Larry.
This photo was taken in Estes Park, Colorado

Sources:

1940s Trailer Home - Paul Kinnick

Harvey the RV, in Estes Park, CO