I think a little bit of scepticism is actually good for this topic, I don't see it as an attack on whether it happened or not, the people who originally thought of these questions about conditions up there were genuinely just curious people.
I don't believe it was a cover up, simply because it would be far harder to keep everyone quiet about it and the complexity of the operation would be far more an enormity than the actual reality of going there itself.
Think about all the "projects" for components they'd need for the equipment to go up there, fake that as well? it's just getting silly at that point.
Yep, absolutely happened, if they chose a planet much further away then the scope for criticism would be much much greater, but as we can visibly see most of the moon, is it really that hard to believe we went there?
You've seen the kind of gaffes the government gets itself into, and could you really believe they'd be competent enough to pull off a hoax as big as that? The Russians would have a field day if they got wind of it.
Michael W