The Revelation 45L Backpack has all the accoutrements necessary for a good slog in the backcountry. With a sleeping bag and pad, however, you'll be hard-pressed to fit much else inside. Your stove equipment and (limited) supplies of food and water will top it off, depending on personal preferences/necessities for pad length, bag size, etc. The pack compensates on the outside, allowing you, the backcountry skier/mountaineer, to load skis, crampons, multiple ice tools, and a shovel.
For peak baggers, the pack can be used specifically for summit pushes. Take out the frame and leave it at home; it's not a very large pack, the frame is (quite visibly) flimsy, and removing the frame makes the pack surprisingly compactable. It can then be stuffed into a bigger, burlier approach pack.
The pockets on the waist belt are barely large enough to fit your inedible "energy" bars, so they will be better suited to carrying chapstick, whistle, knife, and other small items.