Some local farmers whom I know, (but whose land I do not hunt) have inquired of me, knowing that I hunt, what I would be willing to pay. They have people already hunting their land, and are considering making some $$ from them.
Usually when I ask what led them to believe this was a good idea, they reference it being commonplace in the U.S.
I always respond with a recommendation, which is based on advice I received from one knowledgeable on the subject.
They ought, for insurance considerations, first speak with their insurance broker, and perhaps their lawyer, ask recommended liability insurance coverage, and what impact on their premium, a fee for hunting will incur.
Once a fee is rendered for a service, there is a much greater exposure to liability for the party receiving funds for a service. Generally, the increased insurance premium and risk is not worth whatever premium they are considering charging hunters.
It is my hope that fee for access does not expand here in Ontario. Hunting is a great sport, and it ought remain equal access regardless of your bank balance. A bit of common respect, courtesy and relationship goes a long way in securing access to agricultural land. Personally, I do not ever plan to pay for access. I have more than enough land on which to hunt now, some private, some public.