You got that answer

No, I didn't. You guys gave me an answer I already had, and made well clear I already had in the OP. I know what I wanted to know wasn't clear, but I don't get where it was even remotely implied that I don't know the legality of how private property works when I said right in the OP:

the people who own the property itself can in fact reject people from visiting. Unless those people are related to someone buried on the property. But since this is a choice made by the property owner themselves, subjectively... this obviously would vary based on who owns the property and what they decide.

My actual question was more so, how do I go about finding out without contacting them. If they're not obligated to put up a sign. What if they had no way to contact them? What then? How would I find out? But again it doesn't matter now, I was going to call yesterday but then forgot. I'll be sure to do it today.

This is not a sub about what the law should be, or about educating people on why the law is how it is.

Well, this topic has mutated a bit. I think everybody handled this messily like I've said and that has led to several branches of conversations. I'm actually the one trying the most to stay on topic as I have to backpeddle and cut off any chains wherin someone degrades to complete irrelevance and meaninglessness.

You crossed from advice into debate pretty fluidly back there a ways. People interpret that as "why ask for an opinion and then argue with the answer?"

Why ask for an opinion and then NOT question and analyze and MAKE SURE it checks out? Learning is a 2 sided process that requires as much involvement from the student as possible.