Hi, mikeman7918. Welcome to the forum.
One correction and an additional note: the total peak Apollo program staffing was about 400,000, not the staff at KSC/Cape Canaveral. The bulk of this was contractor staffing. (It so happens I am a NASA contractor.)
While many of these people were literally building the Saturn V, or parts thereof, there were many others building the Command, Service, and Lunar Modules, or working out guidance theory, analyzing the space environment and Moon with unmanned probes, or designing and building EVA suits, or doing flight planning, preparing simulations, or constructing and checking out the gargantuan Vehicle Assembly Building, launch pads, Mobile Launchers, and Crawlers. Or setting up a planet-wide communications and tracking network. Or doing many other things.
These people knew their part of the work was sound. But more importantly, a great portion of these 400,000 understood the larger mission context - they had to know in order to do their jobs. The ridiculous cartoon promulgated by hoax believers, that only a handful of higher-ups knew what was really going on and kept an army of wrench-turners in the dark, betrays a profound ignorance of how space projects work in the real world.
Moreover, while there is a staggering amount of documentation and artifacts and scientific results corroborating the Apollo record, along with a detailed accounting for the money spent, there is not one shred of evidence pointing to a massive effort that would simultaneously be required to pull off a hoax - even if it was possible to do so, which it wasn't.
The kicker, though, is that not only would a hoax have to have been good enough to fool all the engineers and technicians and scientists working on Apollo, it would also have to magically anticipate the scientific and technical advances of decades to come, worldwide. That's simply delusional.