The way a pack is loaded will have a big effect on how it feels on your
back. If you just cram everything in without thinking about it, you
might feel uncomfortable and unbalanced – plus you could end up
unloading your entire pack in the rain to get to a jacket you somehow
stuffed at the bottom.
Whether you need to pack your backpack for hiking, camping, travelling,
climbing or ski touring, the main principles are the same. Imagine that
your pack is made up of zones:
Top: Place medium-weight or bulkier items toward the
top or down the front of the pack. This will likely be things like
extra clothing layers, your water treatment system or your first-aid
kit.
Core: Pack your heaviest items, such as your tent,
food for meals, water or climbing gear closest to your back. If you're
using a bear canister to store scented items, this is the zone to put
it in.
Bottom: Put light items, like your sleeping bag, at
the bottom. It gives structure to the bottom of the backpack and is a
solid base for other items above it. A compression sack can help
reduce the size of your sleeping bag.