The first page of this thread was amusing.. shared the Smokies with hundreds of thru hikers this last spring, everyone made room..there were no issues. I didn't bring a tent or any kind of shelter, I was required to stay in the shelter. There are shelters every 8 miles or so in the Smokies and I saw dozens of people a day. I don't even recall too many places in the northern half of the park that a tent COULD be set up at lol
Other then the Smokies, I always have a tent. Either My Tarptent Strato 2 from college or my Hilleberg Anjan 2GT