I have to agree with GG about the AT thru-hikers not necessarily being backpackers. I've met a few and have one friend preparing now, that did the hike for the sense of accomplishment and goal completion. Our friend has never backpacked, and rarely even car camps. Given her past history though, she will walk the entire length. She looks forward to the completion of the task, not to what she'll be walking through. I've never stayed out more than 7 consecutive days on trails or in the backcountry, but in any given year, spend many nights outside. My wife and I have the gear, physical ability, skills and desire, but not a resume'.
It's not to say that someday when we have more time we won't attempt longer jaunts, just not a requisite for having fun, including participating here. thanks
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Charlie