I still pick up feathers just to look at them, not sure that I've ever learned anything from doing that but I do. I'll usually just toss them after I've looked at them for a while, maybe where I found them, maybe not.
I've found roost trees where feathers and droppings were very heavy. It would have taken a garbage bag and more effort that I'd want to put out to remove all the sign.
I hunt both public and private ground now. The public ground is pretty well known by the folks who hunt it and many know it much better than I do. I've been hunting most of the same private ground for 10-15 years and know it pretty well as do the other folks who hunt it. We try to stay out of the way of each other and so far, that's worked pretty well.
In Illinois, we have 5 spring seasons that last about 1 week each. It's a lottery here and you have to specify county and season when you apply. I always try to hunt the first season(s) and most of the folks who hunt the same private ground that I hunt in Illinois, hunt 2nd, 3rd, 4th or 5th because it works better for them. That helps keep it from getting too crowded, so I don't worry about sign.
I also hunt private and some public in other states, when I can, and that's a whole different ballgame for me.
"If he's out of range, it just means that he has another day and so do you."