As for stuff that was super cool to have (some kind of unexpectedly)
the book - There's This River... Grand Canyon Boatman Stories
read a story from this out loud every night (almost) super-cool
worked better, at least for me, than bag-balm
The TL had a garmin inreach with text plan. It allowed our friends and family to follow our progress on a website, and send us texts, and receive them from us. Super cool. Was a lot more convenient than that Sat phone, which was pretty spotty.
lots of battery and/or solar powered lanterns. It got dark early and the sun rose late.
selection of climbing quick-draws. Made clipping boats together at tight landings way easier.
good crew: Spending 22 days together can be tough, having a great bunch of friends there sure helped.