This is well thought-out. Your priorities to me appear to be light, and easy to move with, while still providing serious utility. There are a few things I'd like you to consider adding.

• Phone charger, hopefully for her smartphone that has local topo maps on it
• First aid materials for feet (I recently became a big fan of the Foot Care Module from Rescue Essentials, no affiliation)
• Spare pair of well broken-in boots
• A full-size Leatherman
• Rain poncho or jacket
• A warm fleece
• Signal mirror
• Spare glasses if she wears them
• Dry clothes to wear, most especially socks
• More cash
• Spare sunglasses

I carry a lot more, but my kit is meant to be comprehensive and live in my car, it's not designed for hoofing it longer distances without leaving a bunch behind.