Nothing wrong with them doing their job and in fact, I'm glad they're there but there's no excuse for a ranger or police officer to be rude to a citizen who is breaking no laws.
Sorry about the rod.
As for guns in the park, if this law ever goes into place (remember, Congress passed it as an attachment to another bill, they can just as easily tack on a repeal of this on a future bill), I will exercise my rights (and my Concealed Carry Permit) and carry a firearm where legally allowed to do so. Like so many othere, I'm not worried about bears. It's the 2 legged predators I'm worried about.
However, I'm not holding my breath of this ever actually going into effect. A lot can happen in the next 9 months and I'm sure some anti-gun group already has an army of lawyers planning a strategy.