Herb it was still hard work when we did it. Those guys would pick out a tree and be there for sometimes days trying to get it down. I saw a poster years ago of what may have been the largest tree ever felled in North America ( I believe it was in Oregon). It took a crew of 25 loggers a week to fall it according to the story. The picture was of them on the stump after it went down and you could have put approximately another 50 loggers on the stump with them.
When we did it the trees were smaller and the equipment lighter and more portable (chain saws) so we put more miles on in a day than they did. The worst logging job I ever had was following a feller buncher around a log block doing all the trees it couldn`t get to which meant I spent all day each day climbing up in rock bluffs, out in a swamp, or down in a creek draw wedging every tree uphill so that the skidders could reach it. And quite a few of us drank hard on our days off too.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.