RE: backpacking food?
I don't cook at all, in fact, I take no dishes or silverware of any kind. Not cooking and not building fires lets me insert my camps close to the elk. I commonly camp out within 600 yards of a main elk honeyhole, which lets you get right in the middle of them at daylight.
Breakfast is pop tarts or just dry cereal, like honey grahams or lucky charms. I rebag the cereal into ziplocs. Lunch is usually canned oysters (my one heavy item) speared with a stick, and crackers - again rebagged. Supper I alternate between Pringles potato chips and Ritz crackers and cheddar cheese. Throw in a daily dose of dried fruit and various drink mixes - tang, etc. - and that does it for me.
I've gone up to 13 days on this in summer, up to 8 days in hunting season.