Alpine Ascents gives very detailed instructions about the gear that is required on their climbs/treks. We have learned that, if it’s on the list, you should have it. This, of course, blows up our “only carry-on” travel philosophy. We were able to get everything into two carry-ons and two checked bags.
Below is the AA equipment list (on the left) with pictures of my matching equipment. Big thanks to my buddy Jim Thornton for lending us a lot of this!