I found Barnaby Wainfan's article in the new issue of Kitplanes interesting.
It is causing me to consider a major design change. If I switch from tandem seating with rear baggage to a 2+2, using the +2 as a baggage area when nobody is sitting there (sort of like the "rear package shelf" in my 944) I can significantly reduce the wetted area, and it won't be that much wider.
I am attaching a pdf copy of the article - anyone have any comments? I am a mechanical engineer, not an aero engineer, so I hadn't thought about this a whole lot, I had assumed that less frontal area would result in less drag, but for the stated mission of 2 (or 2 1/2 people) plus baggage I am not so sure after reading this article.