Out here in the West a hunting license for an out-of-stater costs at least ten times that of a resident. At least. Wyoming (I believe) requires that out-of-staters hunt with a guide. You might see about changing your hunting laws...and a big enough stink with your local politicos and in the local paper might light a fire in the State capitol, especially if the pressure in continued.

As for the bow & muzzle loaders. They have a different ethic, especially if they are locals. Bow hunters in particular have to put in long hours of practice, even with the advantages that modern bows give. And when I say "muzzle loaders" I mean those that hunt with traditional weapons, NOT the modern "in-line" guns. They, too, must be skilled to be successful (one shot, for instance, means just that and a couple minutes to reload). To contact the type of muzzleloading hunter I'm refering to, see if their is a local "buckskinning" or re-enactment group. In fact, opening your land to a re-enactment group on the opening day of deer season would probably solve your problem right off the bat.

Don't get a bull -- slobs will shoot it because it looked like it might attack them. Believe this; it's happened to friends of mine. There is, however, no reason not to put up signs saying "Warning! Dangerous Bull!" or "Warning! Vicious Dogs!" Perhaps bright orange signs reading "Absolutely No Trespassing -- Attack Dog Training Facility!" would help.