That "don't pack it too tight" brought up a memory.
For some reason, in Atlanta, you can only put "yard trash" (leaves, branches, pine straw) at the street in "approved paper bags". These can be bought at Lowes or Home Depot.
When my daughter's family moved into a house there, the back yard was six or eight inches deep in oak leaves. The first pack of bags did not make much of a dent in the HUGE AMOUNT of yard trash they needed to dispose of, and they realized that THIS WILL GET EXPENSIVE.
But they had one of those shredders. Portable vacuum-like thingy, that sucks the leaves up and runs them through the vacuum fan, cutting them into little pieces. And they found that you could get about three times as many leaves into one of the "official" bags by shredding.
Next garbage day there are four bags full of shredded leaves out there at the street. And after the truck came by, there were STILL four bags of shredded leaves at the street.
Naturally, they called the garbage department and said, "Why didn't you pick up my leaves?"
The bags were too heavy.