One other argument for screws and fender washers over staples (however deployed) is that screws allow for much easier future tinkering and re-use of material.
I sometimes feel a chicken coop is never quite finished and so the ability to do a bit of easy remodeling has some value. Getting those...
Hmmm. I don’t remember but I do remember it felt like a never ending task!
I just looked at some pictures on my phone where the coop is in the background and it looks like roughly every 8”