The simple fact that many people believe that there was only one mission and overlook the fact that man landed 6 times on the moon, even carrying Rovers, gives food for thought.

In the last mission, Apollo 17, they spent a total of 75 hours on the lunar surface.

If you want I'll buy that in 1969 they didn't go, but the other 5 times?

It is clear that they did go, 6 times. 

 This is a very good point!  Although not proof from a stager's perspective, it's very good that they attempted multiple missions, be they staged or actual.  It gives us more data points for comparison.