The number of students needing placements is in single digits, with many more sites available, so not a big task for the coordinator.
We were not given any info about placements and sites when we started the course (first intake). Observing the allocations, it looks like the coordinator has gone out of her way to put some students at opposite ends of the metro area. Special arrangements have been made in previous years for students on my course.
I think that there some real OH&S issues for students. In my case, I have medical issues that make the proposed travel a problem. I also suffer from the heat and don't function too well in the height of summer. We're also expected to study in the evening and at weekends - there's very little opportunity for family time.