This year (being my first Roo) I started "the list" in January and then converted it into a list/spreadsheet mix. Now for 2013 planning purposes I took the same list/spreadsheet and upgraded it to an organized master document that includes camp gear, clothes, toiletries, centeroo items, food, etc. In May I'll print it off and start crossing things off as I get packed and ready and tape a copy to the inside of my main sterilite bin.
Feel free to call a psychiatrist for me.
Nope, you're quite sane. I know this b/c I do the same thing!