Been planning to through hike the AT in 2013. Zero experience backpacking and 72 years old + I have a pacemaker, a full left knee replacement, and sleep apnea back enough to require a CPAP machine at night. I've chosen to make my own hammock which is the one designed by Speer. I have finished it and the tarp but have yet to actually sleep in it. So I am seeking all the advice I can get. I am also checking with my doctors in every area to get at least a general agreement from each of them. Open to suggestions here about hammocks. Seems the best idea to me for sleeping/backpacking.