Look: your land does NOT have to have signs for trespass to occur -- the signs simply make the fact that unauthorized access is prohibited more noticable and help to define the boundaries of your land. And to say "Trepassing Hunters" in this title is actually discriminatory. Would you permit a birdwatcher to use your land without permission? A hiker? A mountain biker? A dirt biker?

For ANYONE, under normal circumstances, to be on your land without permission is trespass. You can even say, "You may cross" to one and "You may not cross" to another.

May I humbly suggest that you are trying to prevent the slobs, the boors, the drunken louts, from abusing your land? True hunters are none of these.

Frankly, I'd insist that the cops -- fish & game, state, sheriff, or whoever -- do their job, and get like-minded neighbors to insist along with you. I doubt that the crime load is all that great....