I have 2 large Chinook tarps (12'x9') and we usually hang them in a huge inverted V for a group shelter. It works well but we do all get scrunched in the centercen the walls being so vertical and wind blows in from the 2 open sides. Any ideas for a group shelter that has 3 walls and a ceiling? PS: we set this up for a week long pack-in hunt and I've been thinking about buying/making a large floorless shelter for 7 guys to hang out and eat in. I've been going down the Large teepee path but all the good big ones are many hundreds of dollars... Any ideas?