Quoted from mof:
Great photo ops, and then you get to see all the massive oakland cranes up close (the inspiration for the At-Ats in Empire)...
Yep. While attending USC film school in L.A. George Lucas was exposed to the massive dual ports LA/LB and their cranes. Here’s one being retrofitted at Long Beach port 140 I snapped a pic of 5 minutes ago. A few miles away Spielberg went to Long Beach State University.