A few weeks back I played HawksHead in New Haven, MI. It is built on sand and has a bit of a Pine Valley look, down to a mini Hell's Half Acre on 18. On most holes there are large waste areas/bunkers without rakes. I am not sure this is a regular practice but they ran Sand Pros or their ilk through the waste areas the morning before we need off. It made the sand extremely fluffy and a ton of embedded lies.
This fluffy sand in fairway bunkers made me think of the old rakes at Oakmont.
Also, is grooming waste areas a common practice at other courses?