Meet the Hang Solo from Thunder Domes: a portable hammock camping stand that you can use anywhere to relax. It has an aluminum frame weighing only 15lbs that can support 250lbs.. It is designed to work with standard hammock camping gear such as a mosquito net.
You can set this up in about 10 minutes without any fancy tool. The Hang Solo works when there are no trees around. You can even use it to float on water.