I am going to make some additional replies later with food, footwear, and other ancillary items and so forth, but these are all fantastic ideas - thank you! I would LOVE to do some paddling in the Territories, sounds AMAZING! I forgot my coat bag in the original loadout pictures above. I have a rain jacket of course, but also a thin insulating layer from Moutain Hardware that I highly recommend and also a wind-breaking jacket that when paired together are mighty nice.Definitely take the warmer jacket. You haven't mentioned footwear, but I'd suggest having something with you like knee high rubber boots or an alternative to allow for dry feet on cold days. In the kitchen, something to allow for baking - reflector oven, Dutch oven, fry-bake - which I think makes a nice change from one pot glop on a longer trip. Maybe a cold handle frying pan and a couple of cans of Spam? A few potatoes or onions? How are the bugs on the Yukon? - a small screen shelter could be useful. A couple of extendable tarp/shelter poles, if you forsee camping on gravel bars without trees.
Footware I have been debating still. Over the last year I have been "wetfooting" with Merrill boots, but portaging is not going to be an issue this trip. I may paddle in neopreme boots that I like, and I have close-toed Crocs for camp. I will bring a pair of hikers for sure, but tall boots I had not considered. Will need to see how I can organize that.
For cooking I will have a small fire grate and a frying pan as well that I had planned on organizing on or in my food barrel (although they may end up on the outside of my pack) - most certainly want to be prepared for any grayling that may end up in my boat (although I am pretty much the world's worst fishingperson)!