I made a mini mock-up of scottpash's idea. Please excuse the crudeness of the thing (unnamed). I believe you'll get the idea. The open side would have shock cord along the top for entry/exit like the Ted bug net and of course you'll have to visualize the sides/tarp being staked out. This is like a bugnet tent shelter all in one!
I got in a fight one time with a really big guy, and he said, "I'm going to mop the floor with your face." I said, "You'll be sorry." He said, "Oh, yeah? Why?" I said, "Well, you won't be able to get into the corners very well."