Just because a bureaucrat makes a rule doesn't make it legal. Any government agency has a process they must follow to create laws that are not arbitrary and capricious. The FAA has lost EVERY court case and a judge has stated that the cease and desist orders are not legal, all because they did not follow the NPRM process. The same holds true for the park service.
About two years ago I was shooting some test footage when a Park Ranger told me that I was not allowed to shoot in that area, when I asked him why he got defensive, handcuffed me and told me he was going to confiscate my camera equipment. I insisted that he call the local police to which he replied he had the authority to arrest me but I continued to insist. He called into whoever he calls into and they told him to release me and give me my equipment back.
I'm not suggesting that everyone test the resolve of Park Rangers based on an anecdotal story, however for every law there is a "number" and for any law enforcement officer to write you a situation or arrest you they have to write that number on the citation, if there is no number there is no law. That Park Ranger talked on his radio for ten minutes and they could not come up with that number. They threatened to cite me for trespassing, unsafe this and that, disturbing the peace, any catch all they could come up with but they could not arrest me for shooting video [and I was on the ground]. They most certainly can not confiscate your equipment. They might claim they can and if you let them they'll certainly take it but you can stop them by just saying no, if in doubt ask for another law enforcement agency to be involved. They won't want to do it but they have to respect your rights.
This kind of anarchy is what happens when government officials take it upon themselves to randomly create laws are not enforceable, but who is really the anarchist?