I know it's a bit cold for gardening but I just saw this thread. The thing that's works great for me is the motion activated sprinkler. The one I use is called scarecrow. Powered by a single little 9v battery. Hooked up to your hose, works great day or night. You can even daisy chain them together and it is a hoot to watch the dear scatter. It even changes the timing on the activation.
Another good thing is the driveway alert from harbor freight and a paintball gun

Your neighbors will wonder about the green deer....after a few times they will go and munch on someone else's garden.