I agree that teh details of a fabricated story are not the place to get mired.
Kerry has asserted that he was in Cambodia, in 1968. That assertion appeared attractive in a political debate, and as a way to gain sympathy for his proposed policy positions. But he made up the whole story, that's the point. He's a phony, a charade, a shell, a huckster, a shyster. He'll tell you what he thinks you want to hear.
The nice thing about this part of his Vietnam "saga" is that we don't need SVFT to prove him wrong. We have his own account to the Senate and the Globe book saying he was in Cambodia, and his account in Brinkley's book says he was not. There are two types of vet who went on "secret missions." The ones who actually went on secret missions and don't talk about them and the ones who talk about them and are full of s#$t. Kerry is one step removed from Al Hubbard, his side kick from the VVAW that claimed to be a military pilot and turned out to be an enlisted man, never assigned to Vietnam