During my thru-hike I tented at Wapiti shelter. Apron arrival at the shelter it was full because of a rain falling so I decided to set up my tent near the shelter. At around 10 pm I was awaken by a very loud argument. Three hikers had arrived. They pronounced that they had shelter reservations and people inside the shelter had to move out to give them room to stay. No one in the shelter was going to get up and make room for these late arrivers. Their big argument was that they had shelter reservations and thru-hikers occupying shelter spots had to leave so that they could use the shelter because they did not bring tents. After much to do, the late arrivers didn't win their fight and were forced to move on.