http://gages-56.com/Pismo2008.html for the Pismo Beach rally of 2008 http://public.fotki.com/wackydave/vintage_travel_trailers/ for 3 galleries of trailers
For upcoming rallies:
http://www.vintagetrailercamp.com/
http://www.tincantourists.com/forum/viewforum.php?f=2
http://www.teardroptours.com/tours.html
For links to the vintage trailer clubs in your area of the US:
http://www.50stateclubs.blogspot.com/
http://shawnstussy.blogspot.com/2010_08_01_archive.html#5045406272543677438 the 1938 Turtle by Roy Hunt. The wrap around windshields are even cooler, and the nice slope to the front is very good looking, as well as the 30's grill. This one had me recalling http://justacarguy.blogspot.com/2008/03/finally-found-out-what-story-is-on-this.html 
via http://rockindownthehighway.blogspot.com/ is this Diamond T "Doodlebug" fuel tanker from the 30's
Ain't that the cutest! Maybe it was an Airstream Bambi? Mixed with a VW bus I think 
