The weight depends on how much walkin you're gonna do. I usually turn my turkey hunts into a combo shed hunt and end up walkin 5 to 10 miles a day. I 've found the 12 pound doghouse my buddy and I share to be too heavy.
There are some 6 pounders out there and I recently found a 2.5 pound 3 sided pop-up manufactured by Eastman Outfitters. It's called the Eastman's Mag Quick Set. Cabelas carries that for $29.99 and it's suppose to fit on your belt in its case and fold to 16". It's 80 inches long by 40 inches tall and has 6 shooting windows and works on the spring steel principal in popping up and folding down quickly.
I just ordered one from Cabelas and it should be here this week. It's not fully enclosed but it looks like it should conceal well enough for a bow kill. I sure like droppin 10 pounds of gear. That's more room for sheds.
RuttNStrutt