This post is aimed at people whose travel style doesn't allow for doing laundry in the sink. I generally stay in hostels and there is no place to hang laundry. I also tend to go for longer trips, two weeks to a months, so l must do laundry a few times. In the past I would do laundry once a week and pick an outfit to wear while doing laundry that wouldn't get washed. That worked until the dreaded wet-bus-seat incident. I told myself that someone had probably just spilled a drink on the seat, but I really didn't want to re-wear those pants until they had gone through the laundry. I had packed 3 pairs of pants, so I was left with only 2 that were wearable and one hadn't been laundered in some time. I survived this first-world problem, but I want to avoid it in the future.
I think that the solution might be to pack a laundry day dress. It would be lightweight and pack down small. I don't generally like to pack a one-use item, but maybe this would be okay.
Your thoughts and ideas would be appreciated.