A fall canyon trip? Oh that is awesome.
For my first time as TL/PH I used MOE and they have a really great tl packet and stuff that is worth a detailed read.
My first trip down I forgot lipbalm, and that was a rookie move. I packed my own repair kit too, and had stuff that was great and stuff I wished I had. (like around file) We opted for an extra groover can just in case, the sat phone rental (did not use, but nice to have to supplement the inreaches on the trip) and the food pack really worked for us. It is really dialed in. I added a costco fresh pepper grinder (4 dollars) and bought my own cheap but darn sharp kitchen knife (victornox fibrox kitchen knife) in a victornox bladesafe clamshell carrier, and furi diamond finger knife sharpener. Crappy kitchen knives make me really upset, and I was glad I had mine with.
If you have folks that are not keen on cooking they can be on groover team the whole trip, and that can make everyone happy.
One of the folks on our trip suggested making lunches at breakfast, and dividing them up in the morning, and the time saved by not setting up and taking down a kitchen at lunch time really changes the trip. It is a free 40-60 extra minutes a day, and with the days getting shorter, that can open up more hikes, more miles etc.
Also one other thing that worked for us was having a boatperson meeting each morning, and we started with where we are at (what camp) plan for the day and the possible camps and hikes, and any rapids we would stop and scout. We then checked our fittings (set screws can get loose) and then took down camp and got ready to shove off.
I am a huge fan of good socks, and during my WFR, and a few other courses the instructors spoke often of "sacred socks" for end of day/tent use only. for me, they are smartwool mountaineer socks, and they ride in their own mini dry bag (NRS .5L) in a ziploc freezer bag. Dry, sand free sacred socks? oh, that is some good stuff.. Also, even though cotton kills on the river, a dry cotton t shirt is pretty awesome in camp.
It is a great time on the water, and camp, and a magical place to spend some time.
also, adding a pinch of cayenne, cinnamon and espresso powder to hot chocolate will take it to a whole different level. Be flexible, it is an expedition, and sometimes stuff does not got as planned, but, you are also in the canyon, and that rocks.
have a great trip!