I agree with Bobad. The best way to keep unwanted visitors away is to find one or two bowhunters to give your long-term permission. Make sure they understand YOUR rules ( where to park, no guests, etc.) and give them the responsibility of keeping others away. Having a good place to hunt is something they will guard jealously. You can find sports that will improve your habitat, repair fences, post signs, run wire and bring you a little meat for the table now and then. Bowhunters, I think, are the key. They spend more time afield and are unlikely to be barging around blindly hoping to dumb into a deer. Make sure you find some experienced bowhunters and your problems will go away.