Well here's a thought. If it was all faked and the "astronauts" were here on earth on a sound stage, then what was the point of "faking" the Apollo 13 incident? Wouldn't that "faked" event be just as successful as all the others? Why would they fabricate that, and if they did wouldn't it be the most brilliant fake and fictional event ever conceived? And boy weren't those fake Saturn V lift-offs spectacular!
Apollo 8, orbited the moon but didn't land as Apollo 11.