I use a pool deck box with a sign for packages on it, and a camera and floodlight mounted 20' behind it on the other side of the fence. I've never had a problem with porch pirates. But then again I'm pretty rural.
But prepare to be amazed how many delivery guys ignore the sign ON THE BOX that says packages, and just chuck the boxes over the fence. Or like they guy did one time, meticulously stack several boxes on fenceposts.