"The right of the people to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures shall not be violated..."
According to the OC map page, open carry is legal. Open carry in a car is legal. Unless the Old Steel Bridge area is a park under the jurisdiction of the locality and the locality restricted open carry in the park:
Your wife was illegally seized.
You were illegally seized.
You had your ID illegally demanded.
As to the cops handling things in a positive manner, phooey. Cops can be entirely polite while walking all over a person's rights. Politeness gots nothing to do with it. The question is, does the officer have legal authority to do what he does? End of story. Police know the law on seizing people short of arrest.
It goes deeper. Too many times we have read comments here that such-and-such cop didn't know the gun laws and was to be excused (for illegally seizing a fellow American in his own state.) This is a red-herring. A mis-direction. Phooey. Cops don't need to know the gun laws. All a cop needs to know is that he does not know the gun law, or is unsure about the gun law. If he does not know, or is unsure, he cannot possibly know whether he has authority to seize someone for violating the law. If he doesn't know or is unsure, he bloody well needs to find out before he seizes someone.
If the bridge area is a park and the locality restricted OC in the park, you might have got off lucky without a citation.