Welcome to the forum.
We are in the midst of political activism. The experiences each of us have will contribute to the body of knowledge concerning public and police reaction to open carry of a firearm. To be most useful the information has to be as accurate as possible. In the heat of the moment we may not remember all that is said by all of the parties involved.
If someone confronts me, while carrying, I inform them that I am recording our conversation (required by law). If they ask why, I tell them that I have a lousy memory and if I have to relate our conversation I don't want to misquote them.
Also, their permission is not required, they just need to be informed that the conversation is being recorded.