Another good way is to get 2, 12' hog pannels and 2 6 foot pannels and put 6 t-posts in (3 on each side) then cover the top with a green tarp or plywood. The sides can be shot out of easily or you can cut shooting windows. Then, cover the entire thing in camo netting or brush (Brush works the best because it lasts longer and the limbs stick in easily. Its really easy to make, we made one on our ranch and the whole thing took less than an hour to put up and less than 20 minutes to disassemble and move. Because it is so big, there should be no problem getting a wheelchair in and moving around in it unseen.