I am the one who first said "Baker" so let me explain. the tent we used was much smaller than anything in your link (fascinating site, BTW) - about 2' high, 6'long - just large enough for two to squeeze in and sleep (we were backpacking in northern Arizona) - micro Whelan? nano Baker?

Is it safe to say that you take an open sided structure, cover the opening with transparent plastic, crawl inside, and enjoy the trapped radiant heat? I will have to try this out....