The best trailer I know is a pirate friends airstream "Bambi" a early 50's
(16' ) located near Sag Harbor..with his sail boat just off anchored .what
makes it wonderfull is that he gutted it made it clean with oriental rugs and
installed a baby grand in it piece by piece for those "intimate" little
dinners with the Phatom at the key board in  the woods.complete with
candlelabra and hidden bed.....the next best one I know is the trailer used
by Viscount Montgomery during the desert campaign of WW 2 Imperial war museum
  London
...if you like the way the pullman sleeper is designed you will like this one
Monty had it made..
lastly Buckminster Fuller trailer home   which I never saw but I saw drawings
and meybe a photo but Im not sure  as I t was ....the 60's ......anyone know
Fullers Mobile..Home...was it ever built????
all the best I am home from the barbary west coast where I read poetry for my
brothers zen budhist wedding(Jappanese bride)  and danced the charlestown at
the Corinthian into the early hours with all of S.F as a back drop.....oh yea
the shashimi was spectacular...Pirate