So what was it like??? I bet just one of those steel bars is bigger than you.
No kidding! Those things are HUGE! What an impressive piece of machinery. I have a picture from space of the cape and you can see the crawlers in the photo. :-)
Note of interest, when they converted SLC-6 (slick six) at Vandenberg AFB (VAFB) for shuttles, they did not use crawlers to move the stacked shuttle from the VAB to the pad. Instead, they moved the entire VAFB "VAB" away from the pad on rails. I have been fortunate enough to see both the pads at the cape and SLC-6. There is (was) quite a contrast between the two.