For some travelers it can be quite a hassle getting that hammock up there, getting it to stay up there and getting it down again. So first you need two pole-like things. The wider apart they are and the higher you can tie the ropes, the comfier it will be. The hammock should hang about 60 cm above the ground. Finally the best knot for this is the bowline. This knot is easy to learn and even easier to untie, as it will not jam up.