As mentioned above there was a similar concept that someone posted about awhile back. It was like a large sheild that you put in front of you. There was a story/testimonial about a guy hunting antelope with one. Started a couple hundred yards away and kept inching his way forward with the big mylar mirror in front of him. I remembered it being kinda cool at the time. Those big boxes seem like they would be kinda akward, not too portable, would almost end up being permanent stand.