We arrived early Wednesday morning. The Dannenbergs were already there, and it was raining or threatening to do so most of the morning.
The S-IC began moving about 8:10. Each crawler had its own operator, who controlled the crawler via a chest-mounted console. They backed the S-IC up several feet to get a bit more clearance between it and the S-II stage. Then, showing off the capabilities of the crawlers, they pivoted the forward crawler about 90 degrees. It pivoted in place -- the booster never moved.
The S-IC just moved out like a car which had been parallel parked.