I don't think that the Swift Boat operation was of much particular consequence, other than keeping the bad guys under control in a specific area. I think the newsworthy part of it was the projection of naval power inland, like on the rivers of China during the Boxer Rebellion.
I am extremely skeptical that Kerry ever got to Cambodia. During that particular time, US forces honored Cambodia's neutrality, even as North Vietnamese forces did not, and US forces did not cross the border. After Kerry's time in Vietnam, and after my own, we were not so restrained.
Not of any consequence at all. No press coverage that I've heard of - though the existance of the patrols would have rated some minor coverage.