You don't want unnecessary cams weighing you down on the climb. Why would you want unnecessary weight on the approach. At a weight barely exceeding a single pound, Lowe Alpine's Ascent Superlight 30L Backpack keeps weight at a minimum and boasts enough space for approaches long enough to take you into the alpine. It features external carry systems for climbing ropes and ice axes to leave room inside for trad gear, shoes, a harness, hydration reservoir, lunch, and maybe a layer if you packed properly. The unique shoulder straps move with you on the trail, and the back panel removes to double as a bivy mat.