I'll add my $0.02 to Lori's comments regarding elevation and temps.

While I haven't come anywhere close to 10,000 feet I have been down to 23F in my hammock.

I used a 3/8" ccf pad, with a fleece blanket on top of it, RayWay alpine quilt, layers of clothing and emergency reflective blanket on the outside. All covered by a home made tarp pulled down tight. I would have used the same gear if I had been in a tent.

I now have a Exped DAM 7 and really enjoy it in the hammock. I use it partially inflated and it really adds some welcome degrees. I also have a home made "hammock sock" that can add 5-7 degrees.

As others have said, I use a hammock for comfort.

I also have tents and use them when the need arises. Those times are getting fewer and farther apart.

My son also uses a hammock and prefers it. He's trying to convert others in our troop.

Tango
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If you think you can, you can. If you think you can't, you can't. Either way, you're right.