You can set up trip wires...while you can't set up claymores you can take two red stripe bokkles...Set one on one side of the patio railing and one on the other side. Take fishing line and tie the two bottles together..As they sneak on the patio and go through the fishing line it will pull the bokkles off the railing and make a rather loud breaking noise...It will wake you up and scare the poop out of the intruder...Trip wires are your sleeping police..