markoc, as someone who has backpacked a few miles, I, (as a 62 year old man) would like to recommend that your father try a luxury-lite cot. As I have aged I have found that I have needed more and more padding to sleep. If your dad will set himself up with one of the luxury-lite cots, and a self-inflating pad, (because the cot alone will be cold on the bottom), he will be very comfortable. I own two of these cots. The latest one I bought I went all out, and bought the version with the tent that integrates with the cot. Previously, I used a Big Agnes Seedhouse tent on top of my first luxury lite. I have terrible back problems, and can get good sleep at home only on a very expensive Swedish memory foam mattress, but, the Luxery-lite cot is just about as good.
I'm telling you, this cot works:
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I have not tried it with the luxury-tent yet, but I have used my original one with the excellent light weight Big Agnes Seedhouse 1and Seedhouse 2 tents, and it worked very well. You need a complete system, with the cot, a tent, and your choice of bag, with a very thin and light self-inflating pad. With the BA Seedhouse tents, I set it up with the cot on the ground outside of the tent, and placed the tent on top of the cot. The Seedhouse tents are very light, and very ventilatd and dry. I never used one in tornado winds, like my old Mountain Hardware tent has survived, and bet they would not stand up to high wind.
The luxury lite cot is more comfortable than many five star hotel room beds I have slept in, and I'm not kidding!