Sack packs are a simple bag you can carry quite a load in. I think a Kiwi name for them might be pikau
The simplest is just a feed sack or fertiliser bag with rope 'straps' tied to the bottom corners. You need something like a small pebble in each corner to stop the rope slipping off. It has been suggested that you can have onions or potatoes in the corners of the bag so you have some food with you.
The rope on a sack pack can be one… Continue