Maybe upgrade to a larger food tube? That would let you use it as the core of your blanket roll and allow you to carry some of your gear dry within it, along with the shoulder bag. Ever since you mentioned your food tube, I've been reminded of something that Eric Stoskopf has set up, I think he's tied in with the Woods somehow, either as a student or faculty. His set up is here:

http://www.woodsdrummer.com/trailtube.html

In any case, maybe rewrap your duct tape on your food tube, along with your cordage.

I would scrap the pillow. Maybe stuff spare clothes in a cloth bag to use as such?

That being said, I'm not sure how much you want to strip out. At the far end of that distance, you've got a long haul.