What year bambi? Old bambis are light and you could get away pulling it with small trucks like a S10. Harder to find and pertty pricey if in any kind of shape. A newer bambi might actaully be a bit cheaper.
Also Bambi's are short and did not come in 22ft lengths.
www.vintageairstream.com has a phot archives of the various years.
http://www.airstream.com/airstream/p.../weights-1.pdf
Is a complete list of weights to expect
1954 -2002.
Might also dig in the towing section of this forum. Tow vehcile questions are pretty regular and a lot of information is available in there.
Good luck on your search.
Welcome to the Forums!