Hi serenafish,
10 days to go for the big day! yay!
I was where you were not too long ago so know exactly what you mean.
It's exciting and empowering while also being scary as hell.
I was fortunate enough to have a relatively pain free recovery, the only pain I had was in my back from lying on it for a long time and in my shoulder due to the gas. The pain lasted for the first 2 days or so, after which I just had mild discomfort for about 2 weeks.
I still struggle with water, cannot have more than 3 glasses a day and even that's pushing it.. but then I've always had a problem drinking water so may not be as bad for you.
Head hunger is a problem, but as you said the mind is like a child screaming for food, it is also easy to distract. What works for me is trying on old clothes, reading, and if it gets really really bad, I leave the house and go for a long walk, away from the temptation of food! lol
Glad you found a protein you like in advance, will make your life much easier, I was initially on some really horrible powders given by the doc and hated every minute of it.
sorry for the long rant and best of luck for the surgery! Let us know how things go