You guys travel light!
To all of the above items I add: 150’ rope coil, ice axe, carabiners, avalanche beacon, friction hitch, mechanical ascenders, and the all-important UV light. I leave the hangglider on the roof of my cachemobile.
Actually, all the suggestions are great - depending on the location. For example, if it's a park-&-grab and I've seen the satellite photo and there is exactly one lightpost near GZ, then I take 1 item only: a pen!
Happy caching, all!