There are a few other things that we brought with us that have been invaluable to an extended stay in a hotel. These were all items that we purchased for previous adventures abroad (Peru and Thailand) and I think they are all nifty little tools to share:
Campsuds: This is a multi-purpose, biodegradable liquid soap that can be used for clothes, dishes and body. While we have bathed with it before, we are using it for clothes and dishes right now. There are several scents available and it is concentrated so it lasts forever. We have a 4 oz bottle that has lasted us from our Peru/Inca trail trip a few years ago.
We use Dr. Bronner Castille Soap for showering and other cleansing. Another excellent concentrated all-purpose naturally derived biodegradable liquid soap.
Pack Towl: These microfiber towels are amazing and we have them in 4 sizes. Ours are a previous generation, so I assume that they could only get better. They have been great as dishtowels, bath towels, wringing wet clothes dry- you name it. They're light, have a snap loop to hang with, wash perfectly and dry incredibly quickly. What more could you ask for? Be warned though, these are not cushy towels. It's a bit like drying with a giant chamois, but they get the job done.
Frio Pouch: This was the only solution that I could find for trekking in Thailand in 2002. I needed something that would hold my insulin and keep it cold when I was going to be away from refrigeration for extended periods of time. The Frio pouch was/is a godsend. It has a gel that is activated by water that keeps the pouch cool for days. Soak it for about 10 minutes or so and you're ready to go. When the water starts to evaporate, simply re-soak it (I did this in more then one stream during the Thailand trek). The gel dries to a sandy texture and it completely reusable. Saved my insulin from the Thailand heat and has gotten through airport security in my carry on and everything!! MEDICAL DISCLAIMER: I highly recommend carrying a doctor's note when traveling with any medical supplies/devices. I have also found it helpful to call the airline and have a note added to your record if you are traveling with large amounts of supplies (thank you to Brad for recommending this). It saved me a whole lot of trouble this last time! Also, just because it worked for me, does not mean it will work for you and/or the airline you are flying. Check and double check with them first!!