Welcome to AthoroughBredNamedBabe, I am in the UP of MI and I can tell ya why the farmers stopped letting people hunt on their land. It is because they get paid more from the Government in crop damage then they can make selling the crop.
Boyd as far as shooting all year round up here there is big fines and you can lose your guns and hunting rights for a very long time as well as sit in prision. So if ya listen to that person who told you they don't care if ya violate, well you are taking risks if ya get caught.
Crop permits for farmers are given every year and yes they kill the does with these permits but you must remember for every buck there is 50 or more does, so to control the population of the deer the does have to be managed as well.
That said I get all the venison I want as my brother David is the one the farmers in his town call to harvest the crop permits. He then finds out who in the area needs help and he brings these deer to the needy familys in the area. I don't ask for venison very often as we ate tons of it as a kid, I am the last of 13 kids my family had it hard but we were raised with God in our lives, taught the values of honesty and hard work, were loved and ate plenty. Can't ask for more than that.
Hunting is being ruled right out of exsistance. Here in MI they have raised the cost for out of state people to hunt to a blown out of the water price. That is one way to ensure that no money is made for MI. Soon we will be a ghost state.