I'm watching this thread with interest. It will finally come down to which pack will hold both the tent that I love, and a sleeping bag, depending upon season. The other items I think I have figured out.

I happen to have 3 bags: 2160 cu in, 3100, and finally a 4850.

Likely, no one here would use the 4850 Gregory Lassen except for unusual circumstances, and the 2160 is definitely my day hiker for the maze of trails that is Acadia National Park. What I want to know, therefore, is how much I can do with the middle one.

(This is me, getting back into it after a horribly long stretch, I might need to pay more attention to the not quite over the hill sub-forum! )