I am really new to hanging. I have only got to hang on a couple of occasions so far, and both in the back yard. I love the comfort of a hammock but do have a couple of questions. First when you all talk about the hammock suspension is that the lines at the end of the hammock or the tree straps? My second question is when you are in the hammock how do you keep from sliding down in the hammock? I was using an self-inflatable pad and using a mummy bag for a top quilt. I also had a poncho liner for an under quilt. I keep sliding down and I woke up the next morning with a splitting headache. If anybody can tell me what I am doing wrong it would be greatly appreciated.