I wasn't sure what sub-forum to post this under, but since I am only looking at waterproof stuff sacks I figured this was the most appropriate.

I have no idea where to start and no one really talks about them in depth. How many does a typical AT thru-hiker need? How do you segregate items? How many liters for each? Is everything in your pack in one of the stuff sacks or are some items left out? I know every hiker is different and all these questions are relative, but I want to go in researching what to get with some general knowledge first. Thanks!