Like krotalus said, it is your land, you own it, and you pay taxes on it. It's no bodies bussiness to be on it, if you dont want them to be. If somebody has a problem with getting written permission from you before they can hunt your land, then they are the type of people who you dont want out there in the first place. They should feel lucky that they get to hunt somebody elses land for free.

The home that you live in, do you think people should be able to come and go, use your bathroom, sleep in your room, and eat your food in the kitchen, without asking?