A New Zealand design company called W2 Limited has created a trailer concept that has some interesting design features. The concept is called the Romotow. While the design as shown would be impractical for overland travel, some of the ideas shown might inspire you. Thanks to Wired Magazine's Autopia blog for the link to the Romotow.
More information here http://www.romotow.com/
The W2 web site is http://www.w2.co.nz/
More information here http://www.romotow.com/
The W2 web site is http://www.w2.co.nz/