I am currently brainstorming ideas for an aerodynamically clean cargo trailer to pull behind my Prius for a cross-country move. I have a basic 4'x8' flatbed utility trailer (which knocks 10-15 mpg off the Prius even when unloaded), a longer converted boat trailer and a narrower jet ski trailer. My thought is to try to keep the trailer's frontal area well within the frontal area of the Prius. I need to protect the contents from weather so am toying with building a very lightweight "poor man's fiberglass" shell. I also am thinking the bottom should be sheathed to cut down friction from the road surface. Anyone have any ideas/experience along these lines?
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