Hi rhysmacallister,
this is not directly related to your questions but I believe it should be mentioned.
Based on my experience, what you consume in days prior to the climb can have a significant impact on your consumation of food and drinks during the climb itself. This has a big impact on shorter routes (1- 2 days) because it enables me to take even less food and water. Basically I try to drink a lot in 1-2 days prior to the climb. Also I pay attention on the food. Mostly carbs and fat while avoiding protein imput. Especially dinner in the day prior to the climb. If I eat salty food I tend to drink much more during the climb.
I know this is not something new for most of professionals but I believe it can have a big impact on what and how much do you eat during the climb.
Cheers,
Goran