Is this trailer a great idea, or what? I hadn't thought about this type of design, but all of the sleds now have reverse, so you don't need a door on the front anymore. Less cost, plus benefits of fully enclosed trailer without hassle of clamshell design. I wonder if they will make this in a larger 3-4 sled size.
http://www.tritontrailers.com/products/Model.aspx?CatID=27&SubCatID=55&ModelID=489
http://www.tritontrailers.com/products/Model.aspx?CatID=27&SubCatID=55&ModelID=489