RE: Ive got a runway but nowhere to sit
Wait for the wind to get right, tote yourself a folding chair out there to the hedgerow, find yourself a little hidey hole and plop your buns down to hunt. If you have to make a blind, keep it simple and don't disturb the area any more than absolutely necessary.
Think about how you'd feel if someone came into your house, unknown and uninvited, and moved a lamp from one corner of your living room to the other. You'd notice immediately and be kinda freaked about it, until you found out who did it and why. If that same person had simply changed the lightbulb in that lamp from 100 watts to 65 watts, you'd probably never notice. That's the kind of subtlety you have to keep in mind when you're constructing a natural ground blind.
Now, if someone came along and parked a Volkswagon in your living room, you'd darn sure notice that! Even if it was painted to match the carpet, you'd know it was there. That's a popup blind in the woods. If you've got to use one of those things, put it up a week or two ahead of time and let the deer get used to it being there.
For your natural blind though, all you need is a thin screen of brush in front of you, to help break up your outline. It's nice to completely conceal your feet and legs, if possible, so they won't see any movment when you shift into shooting position. The main thing though is to have a thick screen of brush behind your upper body. If you're silhouetted, they can see every little twitch you make. The thick screen of brush behind you will help the thin screen of brush in front conceal the movement of your upper body.
Use face paint, mask or something to cover up your mug and wear dark or camo gloves. Your face and hands shine like a beacon at ground level.