Great stuff Scodler. Your timings are really helpful. That is about what I am aiming at.
Re: Scoff and Quaff. 1.5 litre camelbak in a small backpack with prepacked wraps (easier than sarnies to hold) and flapjacks is all I need to for this. Top up drinking with sips from streams if needed. The key is NOT to knock yourself out. Ruddles Rule is crucial.