I brought the cargo pants with the zippered pockets and fabric that stayed relatively unwrinkled. These were made by Dickies.
I could do laundry in my sink in the hostal. I did it only once. I washed my cargo pants and some underwear, socks, and shirts. They dried in a day or two at most and that set me up for the trip. Eleven days is a lot different than over twenty. They I have to do much more laundry.
I used a bar of Fels Naptha and find it works well on stains. It is cheaper than the hand wash liquids and it gets through security.
It works fine in laundry machines as well, but I take a knife and shave it in those situations so it dissolves easily.