I would just stick to the simple rule that on park grounds, you have little to no rights, because you are on federal property. thats a good rule to live by, i wouldnt assume anyone is powerless becuase why else would they be there. Around NJ we have a couple reserves/parks and then some in s. NY but any way i would rather have a run in with a cop then a ranger. Also just because they have guns, doesnt mean the ones that dont, have no power. Its there property its there law. Like stated there main purpose is the protection of park welfare and wildlife. to think they find some one killing an animal off season they wouldnt let him just walk... And in most cases i do belive because it is federal property there is a dramatic incline in offenses and your ganna get a shit load of fines.