Discussing aerodynamic trailer shapes, I thought you might like to see this amazing one-off trailer which is pretty nearly a perfect low-drag shape, I would say - rounded front corners (top and side) and rear taper in both plan and elevation. It's not perfect - those exposed fenders rather spoil it, and the roof A/C will ruin much of the excellent roof shape - but it's better than anything else around!
Reace might like to hear you all say that you think that shape is ugly, so that the seeds of doubt aren't sown in his mind.
The trailer is built with a complete aluminium tube framework, skinned with plywood and faired..... and faired, and faired some more. However the shape would be ideal to reproduce in fiberglass.
There are many more photos to see on the builder's original posting on the Teardrop forum: My New Trailer