I assembled this HDA as a personal test to see if I could write most of it into a single detail wrangle. It was not the most efficient or effective, but it was a fun technical challenge for me. There are a bunch of parameters to play with and animate.
The HDA, over time, will generate (without any position overlap) a starting set and an ending set of points for repositioning. There is some very basic non-simulation-based avoidance.