Shrug,
there is a man who designed and built his trailer back when teardrop times did things off of the traditional but gat narrower as the people increased and they needed to stay with in the main topic of teardrop trailer. Filled with many interesting ideas.
anyway look at this site. it is big and heavy double axle but I have seen the trailer and bin in it.
http://www.maxitear.com/maxitear/maxitear8.htm
I am about 6 foot and could stand in it.
Ron D.