A lot of people do laundry during their trip. I don't, I'm on vacation and usually plan on having at least one more day off work when I get home so I do laundry on that day. Even clothes I haven't worn get washed again, I do grab the laundry bag Disney provides to put my dirty clothes in and either put them in the suitcase in the bag, carry the bag attached to the suitcase or use the bag as a barrier between the clean clothes and the dirty. All the laundry is done before I leave so it's just vacation clothes that need to get washed. I also don't cook if I'm in a room with a kitchen, but then again I rarely cook at home either so that isn't so strange.