Unless you have a flock of trained ravens that carry all your gear in their beaks, you need a light, rugged, and versatile pack like the Lowe Alpine Cerro Torre 75:100 Backpack if you're going to have any sort of success on your next long-range backpacking and trekking mission. And since you don't have a gaggle of gear-toting birds, you should know that the Cerro Torre uses Lowe Alpine's adjustable Axiom+ Back System to fit users of different sizes, along with a rotating hip belt and sprung steel frame to carry loads of up to 70 pounds. It sports both top and bottom access, along with expandable capacity to give it the versatility to handle a wide range of adventures, and even has a removable hydration pack for short missions away from basecamp. Since you never know what you'll run into, Lowe made sure the Cerro Torre's ready for pretty much everything. Made of super-tough grid nylon, it can bust through thickets and scrape over rocks with no ill effects, and it's treated with a TriShield TPU coating to keep you dry through the inevitable showers and downpours. It's also fully featured for easy use when you're on the move, with stretchy side pockets for water, snacks, maps, and layers, a Tip Gripper trekking pole carrying system, multiple lash points, and compression straps to lock down your load. It even has a haul loop, so your partner can give you a hand when you're trying to hoist what feels like your own body weight onto your back. Your raven can probably even use it as a perch if he wants to.