Being checked while out hunting and being raided are not the same thing, not by a long shot. A warrant has always been required to search someone's curtilage (home, outbuildings and surrounding area).
What does upset me is the national trend to let people with great means and influence (large landowners in this case) steal the resources that belong to all of us. An additional consequence of that leads to only having the law enforced on public land. That isn't the American way, we are a nation of rules and laws not of kings.
Do you want to try to address the two points I did actually make?
What is an alternative method to protecting a public resource on private land if not the open fields doctrine? Drone surveillance, no thank you.
Why is this only an issue for people doing illegal activity? For people following the rules it's a non-issue.