All of my blinds are on scaffold I got free when contractors left them behind on jobs.They were told to come get them and did not. Anyway scaffold puts the floor at 5 feet. I build with plywood and make them as tight as possible for scent control. Made the first one in 1995 and have taken too many deer to count. So ,yes the little elevation is helpful. And hiding your movement is huge.Color does not matter.Brushing it in does not matter. Setting it up 2-3 months before the season does matter.Making it easy to assemble and dis-assemble if you want to move it(which you might) is a good idea.I build them lite , typically with 1/2" ply and 2X2's.