Some ideas based on the experiences of my wife and daughter:
Osprey makes terrific women's packs. Make sure she tries the Exos for a while with weight in it - it seems to be made for very slim athletic people, which should work for her, but that external frame can dig into some odd places. My wife has an older Ariel 55, which is great but the newer ones are heavier. (Ugh) The ULA Circuit is my favorite pack, so of course I'll recommend it. +1 on the idea of some sort of frame for the pack, even if it's just a hoop frame like the Ohm.
Bag: My wife likes her Montbell UL super stretch down bags, the older model that doesn't have the diagonal thing. It has pockets to hold the down in place, not continuous baffles, so it stays in place above her hips when she sleeps on her side. (New one has cont. baffles.) Also, it lets her thrash around and moves with her. Early April calls for a 20 or 25F bag in my experience, with a full zip for summer use. Possibly available used? Otherwise look for a Marmot Helium on sale, just saw one at backcountrygear.com for $250 or so.
She'll likely want a puffy down jacket for use in camp and inside the bag for cold nights. My wife brings her Montbell UL Down Inner from May through October. Might not be quite enough for April, but that depends on your friend.
I've been using Tarptents since 2004, and I really like the looks of the new Notch, a solo trekking-pole tent. As I already have a Moment, I don't know that I'll buy one for myself, but it seems pretty slick. Or perhaps a used Contrail would be a better bargain, though I'm not a fan of the top-entry.
Not sure of the things you won't think of... 8^)