I have been away from my computer for the past few days and was catching up when I noticed the following post from 53FlyingCloud:
I seem to remember a picture of Wally pulling an Airstream with a bicycle??
This is not myth or advertising hyperbole it has actually been done with a 1948
Airstream Liner owned by Clyde Wagner at the 1999 WBCCI International Rally in Dayton, Ohio. The bicycle used in the towing was a slightly modified mountain bicycle.
I took several photos during this demonstration, and a few can be found at:
Towing Airstream with Bicycle Demonstration
The above is one example.