I have seen the Saturn V boosters up close in Houston, even driven past the fully stacked/vertical one in Huntsville. Hard to imagine something *bigger* flying...
My father was part of the training group for the Astronaut Corps in the 60s and 70s and I saw several Saturn V launches up close (as close as a civilian could be) as a child. I'll never forget the sight, sound, and feeling. This one is even larger.
My oldest son works now in the space program as well, and has been very much a part of the design team for the SLS system. He is one of the designers of the solid fuel jettison motor at the top of the rocket. This launch vehicle will go into space this November in an unmanned free-return mission around the moon (similar to Apollo 8). He will get to witness that in person, and I'm hoping to find a way to get close to the launch site with him.
There's a lot coming up in this field. It's quite exciting where things are headed.