1) Carry 2) Mount Whitney activity 3) Packing 
hiking into the backcountry with all of your camping gear and supplies on your back (in a backpack).
[wilderness] Backpacking is generally an extended journey or walk with a backpack. However, for North American hikers it more frequently describes a multi-day hike that involves camping, though occasionally it may involve the use of simple shelters or mountain huts. In New Zealand, tramping is an equivalent term though overnight huts are fr...
recreational activity of hiking while carrying clothing, food, and camping equipment in a pack on the back. Originally, in the early 20th century, ...
Traveling with all of your belongings, including tents and sleeping bags, carried in a backpack
noun carrying something in a pack on the back; `the backpacking of oxygen is essential for astronauts`