Make sure to talk to the docents - many (all?) of them are engineers who worked on the hardware! Last time I was there I spoke with someone who had worked on an IMU mounted in the interstage.
That matches my experience. I spent a wonderful time talking to a docent who diagnosed some of the failures on the Skylab booster. (Which came very close to not making it.)
I got to go up in, and on top of it once - an unreal experience. It is also the tallest exurban building in the country IIRC. From across the river, you can see it from over 10 miles away quite distinctly.
Not to mention the VAB..
https://en.m.wikipedia.org/wiki/Vehicle_Assembly_Building
Pretty much everything about the place makes you feel real small ;)