Not an official contest entry, but a wonderful 36-page gloriously colored booklet full of classic 60's illustrations of mid-century vacation homes. The Douglas Fir Plywood Association offers a wide range of different build-yourself homes.
I'm torn between the "Convertible" Second House with its ever-present quotations of doubt, the Shoreside Homarina and Dock (Home+Marina, get it?), the Three-Stage Beach Cabin, and the Versatile Shorthill, pictured below. (full size 1864x1181).
Dig the happening interior, and the guy with the pipe. "Mighty pleasant on warm summer evenings," I can hear him say with the pipe clenched in his teeth. Plywood!