I am usually camoed up and semi hidden. There will be times where I will use a natural blind (under a tree if I am open country, brushpile outskirts,etc), depending on the country. Most of the time, I am just in my camo, and try to blend into (ontop of) an old stump, or anything high, so i can see around me as best I can. I have been contimplating getting a blind though, since I use hand calls so much.
Here I just used an old camo burlap sack and cut it up to fit my head (sits ontop of my hat, here I am coyote calling, I dont wear black when I am bear hunting fyi) and made a poncho out of the rest...frayed the ends, which works out pretty well. I can blow with the camo hood on cause it overlaps over my chest so hand movement is limited visually.