This is about as cool as your trailer will get

via: http://slammedsixty.blogspot.com/

Has to be a homemade trailer... cute! (I was corrected... see below)

Via: http://svammelsurium.blogg.se/
The trailer is of east european origin, polish or czech. Its originally intended for motorcycles, and you can see one that carries motorcycles here: http://justacarguy.blogspot.com/2011/02/one-wheel-trailer-used-for-hauling.html

Terrific VW van and camping trailer

Previously but not as well covered here: http://justacarguy.blogspot.com/2009/04/perfect-period-trailer-for-this-vw-bus.html

1936 and 37 trailers

Via: Shorpy