Having limited space on the farm where I grew up we would set the compression on the baler quite high so the bales would weigh 30-40Kg. It wasn’t too bad with the old sisal baler twine but with the newer polypropylene the weight really dug into your hands so you had to use either gloves or a bale hook (think along the lines of a big fishing hook with a wooden handle).
In the 1960s there were a lot of bad summers so we’d stack the bales in the fields in long rows of two bales lent against one another and aligned with the prevailing wind to help dry them a bit more before putting them into the barns.
The modern big bales require less manpower to move around, loading a trailer with the old style bales required at least two people, usually three, then a similar number at the barn.