What was the original question????It was "what do you carry ......" NOT what is best, or who is better, or who is a gapper, or who can beat up who, or who is cooler or or or or.
That being said, I ski Jackson Hole as a local, (taking today off as I don't ski when it is below zero anymore) Started skiing in W. NY (KB, Glenwood, Holiday Valley) in 1965. Lived in Wyoming since 1978 and have skied JH or as the marketing office used to call it "the BIG ONE" since 1978. Average 30+ days a year and have a real M-F job.
In answer to the original question: I carry money, my drivers license, a credit card, chap stick and a handkerchief. Thats it.
Jackson is big, but I am never more that 10 minutes away from water or food. I eat my own cooking enough and at 53 I can use the break of a lunch that someone else made, and a rest. When I was in my 20's it was different, I didn't need the break couldn't afford the mountain food, and wanted to "get my moneys worth" out of the ticket.
We all need to keep in mind. IT IS JUST SKIING. Some days its good some days its bad, and no matter who you are, there will always be someone better, braver, faster, or cooler than you. And that person sure isn't me.
Off the topic, but in the framework of cooler, faster, and braver, last season I did see Tommy Moe ski for about 10 seconds, and he was gone gone gone, Gold Medal winners sure can put on the afterburners with not even a second thought.
And he wasn't wearing a back pack, or an hydration pack, and he problably didn't need his ID or CC or money.