Good luck on finishing this huge project that you have taken on. Sounds like you are doing it the way I would do it and I could just hear my DH complaining about lugging up the 'same' box, which is actually a different box.

My parents, mostly my father, are going through their stuff in the basement and filing cabinets and cleaning out. My mother is the type to hold onto everything so this is a hard thing for her to do, especially with her health the way it is. I am helping as much as possible so that later there won't be as much work to do.