I guess I'm a combination of 2 and 3 - everything is grocery store stuff except for fz dr dinners -  don't cook other than to boil water, so I don't have "ingredients" per se, but I put the entire day's food into one bread bag (works for two people), and number them, the idea being to have as much variety as I can get - so maybe day 2 and day 8 will be the same, but not day 2 and day 3 - and last day is on the bottom, first on top  (FILO as us countants like to call it)- I don't like to bother much with meals, so my method makes it pretty simple for me - grab today's food, take out the breakfast and lunch, and put the dinner back in the food bag for later. It does take a lot of planning and packing at home, but once its done, its done, and I don't have to bother at camp.  I often do long days, so quick and easy works best for me.