The Gregory Deva 60 is a nice pack!!! I've used it 3 times and my cousin is using it next weekend when we go to Havasu Canyon. Otherwise I'd offer it up for a "loan" for her to try it out.
It has some nice features and easily holds 100 oz water bladder in a hydration pocket. Has a separate sleeping bag compartment and three easily accessible outside pockets, even a place to stick a nalgene bottle. My only complaint is that it's just not big enough for me if I'm going on a multi-day backpack (since I bring my own of everything) but if you have a pack that can carry the larger stuff that you share (tent, footprint etc) then this is a great pack for her.
"May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view. May your mountains rise into and above the clouds" Ed Abbey