The Deer Hunter's Tent: I have just been making a new version of this tent in some 1.25 oz silnylon I bought from China for $4/metre. This makes a roof at exactly 274 grams ( have weighed it) in a stretched version which I will be posting about soon (plus patterns to download). It allows for a ‘bed’ area of more than 7′ x 5′ plus a vestibule, so about 45 square feet all up.. This roof area would weigh 205 grams in the .93 oz fabric (US$8/yd) and 170 in the .77 (US$16/yd). I doubt the double cost is worth the 30 grams saving. When I add a floor to the existing roof the whole thing will weigh around 420 grams (including tie-outs). In the .93 fabric the tent with floor it will weigh 304 grams (250 for the .77 oz)

In cuben you could go even (slightly) lighter but it is very expensive at around $30/yd (http://www.zpacks.com/materials.shtml)and very fragile.  I have a piece I can salvage from another project so I may make a cuben model with a .93oz silnylon poncho floor – I expected the whole thing (including floor) would weigh under 250 grams after I have made another one in Tyvek to get the measurements just exact. This one was the prototype. Not bad for a two person tent though!

The waterproof section of the floor would only be roughly 5’ by 7’ ( or anyway the size of the poncho), less a bit so that you get a ‘bathtub floor’ effect (if you use a poncho). However, there is also a floorless ‘vestibule area of about 7 square feet for dogs, and gear stowage. I expect if you are vertically challenged like us you will have plenty of room to shove bits and pieces at the ends and side.