My wife is a Kiwi and we have backpacked 3 of their big hikes. My only comment is we used big laundry bags to put our backpacks in so the straps are covered and it keeps them cleaner and adds a bit protection from wandering hands.
And protects them if they are checked.

If there is any proof of a man in a hunt it is not whether he killed a deer or elk but how he hunted it.