I have a tower blind and it sets out in the wide open. I put it up a couple years ago the weekend before shotgun and had fresh tracks walking by it and watched a doe walk by so close I could hardly see her through the windows that Saturday morning. I think the biggest issue with a ground blind is concealing your movement inside the thing. My older blind is like a ground blind and sets about 2 feet off the ground and I set it up in fence rows or on the edge of a tree line. I've set it out the afternoon before and shot deer the next morning and never brushed it in. I just don't think brushing one in is that important other than it may appeal to you more than the deer, but keeping the movement concealed inside the blind since you're at eye level is more critical in my opinion.