20 years ago at the first club/range that I was a member of, there was an older gentleman that came out every Saturday afternoon and used the far end shooting position (we left it for him anyway). First order of business for him was to spread a king-sized bed sheet on the ground (with the majority of the sheet to his right side). If it was windy, he had four bricks in his trunk to hold the corners. At the end of his session, 99% of the brass was on the sheet, so he just gathered the corners, picked it all up in the sheet, and dropped it into a bucket....... still in the sheet.
I have done the same thing at home, shooting handguns and also for shotgun shells when shooting skeet.