Daughter and I have started section hiking the At. Last year was just day trips and one overnight where we stayed in a shelter. This year planning some multiple night trips and figure instead of the shelters we will be using some of the campsites listed in AWOL's guide. (I realize there will be plenty of other sites available but these have reliable water sources listed). The question is, if we arrive at one of these sites and someone is already there do we 1) just start setting up (assuming there is room), 2) ask the people already there if they mind if we stay or 3) say hi, refill water and move on?