A lot of the people I’ve met on the Trail, including people I’ve hiked with for many days, have tried the Go-Lite way with mixed success. The two biggest complaints are: long-haul carry-comfort, and durability. Some do insist that they are happy with their Go-Lite choice, however.
On the issue of durability, keep in mind some outfitters have stopped selling Go-Lite packs because of the durability failures seen often during a long-distance trek. They have concluded the lighter Go-Lites just aren’t well-suited for even minor abuse, or carrying more than 20#, and have eliminated this source of aggravation in the businesses.
The general theme above if going the Go-Lite route is to keep everything under 20#. This is easier to do in High Summer in the mid-Atlantic states when you’re carrying far less and resupply every two to four days. Much harder to do at either end of a typical NOBO thru-hike due to weather concerns, terrain, and (up north) distances between resupplies.
Many, not all, have felt that a good compromise is to go with a 3500 to 4200 cu. in. Mountainsmith or Osprey pack having a real hip belt and a few other bells/whistles weighing about 3#, but advise you must be as frugal weight-wise with the contents as you would with the less-forgiving Go-Lite packs. No need to use a pack weighing more than 3 or 4# IMO for the A.T. The 6-8# packs may “carry” well for short distances due to their geometry and such but 8# is 8# over the long haul–especially on the knees.
Generally, most hikers seem content while on the Trail if they can keep their three big items (pack, sleeping bag, and shelter) to about 6 to 8# for the start in Georgia. With a 3# pack, 2.5# bag, and 2# or less shelter this is very do-able without giving up much in the way of comfort or safety. You can switch out a lighter bag north of about Pearisburg or Daleville and reduce that even further, tho you’ll want to get back the heavier bag in Vermont or at least before the Whites.
Personally, my pack (Mountainsmith Auspex, 4200 cu. in.) weighs 3#, my 15-degree North Face down bag weighs just under 3#, and my Six Moon Designs tarp-tent weighs about 2#. Total is under 8#, and it works for me. In summer, plenty of excess room as I don’t fill it; in winter just enough room for all the extra clothing, etc.
Skyline