This will work
See the last hen in line - set up the blind against that large boulder. You might need to clear a bit of brush.
Your blind is nothing more than a boulder that fell and is in the way. Keep the back dark to not be silhouetted. A tiny slit in front is all that is needed.
Remember to poke the gun barrel slightly past the fabric of the blind and straight at the bird.
And my decoy (if used) would be where the 1st hen in line is so that the tom has to walk by a bit.
It will work.
JW