Just a comment about Gila Bend (not getting into the pros and cons of it vs. Yuma!). We stopped there last winter on our way west to Yuma and southern California and got the last campsite at Augies. It was a surprise since there were no problems getting sites there in previous years. The reason is that the park was full of construction workers from the solar facility west of Gila Bend and the Culligan recycling facility being constructed.
The owner of Augies indicated that the park had been full on a regular basis because of the increased economic activity in the area, it's not the sleepy town it was before! Be warned coming through.