The "Post" (and I should have been more specific, sorry) is a privatley owned, 
 light post.  Its like a wooden electric pole, foot or so diam.  The light is up high and I was looking into placing the camera a ways below it.  I will check the link on rigging.  We do have cold weather, that is a factor, and one of my concerns.  Its a paved lot, so trenching is not really a good option, but is still one. Thanks for the thoughts.