Carol,
I went for a very short 2.5 mile hike with the LL pack, loaded with my base weight of 17 pounds, to get a feel for the pack. This is what Bruce Warren recommends. The pack felt GREAT – the weight was all on my hips, none on my shoulders. Unlike other packs, Bruce suggests placing the heavy stuff in the bottom cylinder – so that’s where the tent, raingear, and stove went. I put my down bag and spare clothes in the top cylinder, and used the middle cylinder for food and misc.
There is a review of the LL pack posted by Henry Martinat on March 18th. He did the AT trail in 2005 using one. Like him, I have 2 large and 1 medium cylinders.
Next hike, I plan to use the front pack. It’s dorky looking, but is supposed to add some counterbalance weight to the LL pack – not that much is needed.
Hope this helps you.