A lot of times what I do is just carry a 6' x 6' square of camo cloth and drape it over me. Really breaks up the human form and I look like a rock. I use this for my kids a lot as it allows them to move a little under the camo cloth. I'll wear a Nat Gear top and then just wrap the cloth piece around my chest. If it's windy, I tuck it under my legs, if not, leave it out in a crumpled pile.