Great idea for a large back yard: Use solar lights. They aren't just for the ground! Cut into squares to fit the existing fence posts. Using galvanized screws - not nails - to screw a "L" bracket to the underneath base. Then on top, screw on the stake.
I love this under stair indoor "dog house." Its out of the way and it even has a window. What more could a dog want? I do want this somewhere,so that while we are gone,they can look out of "their window" and watch for our return.