Anyone come up with a rucksack for hiking gear that can be put in the plane overhead locker. My base weight is about 6kg and I sometimes fly to Europe for hikes. I have Zpack ArcBlast which goes in the hold leaving me on board with a Zpack 4:1 shoulder bag for documents and techy stuff. If there is a baggage issue, which has happened, I am vunerable as I would then have no gear. The ArcBlast is not far off; if I took the hip belt off and put it in the bag it might just work but I would look pretty silly if it did not fit in the locker. I also ski and see some hefty bags being squeezed into lockers.