I see your lav issue and raise you one.
Don't read this if you're eating or have a weak stomach.
We landed at Hot Springs, VA. The boss had his three daughters with him; they were waiting on a friend to pick them up to take them to their farm. The friend got lost coming up the back roads to the airport.
About 30 minutes after we arrived, the oldest daughter, 9, goes in the airplane and disappears for about 5 minutes. She comes back out and says "excuse me, but the toilet isn't working right". The toilet is the old honey bucket kind. You lift up the seat cushion, a motor opens up a flap to expose the honey bucket hole, and you do your business. When you lower the seat cushion, the flap closes and the toilet flushes. The airplane is powered down at this point, so the flap doesn't open or flush, hence the little one letting us know it's not working right.
I asked if it was #1 or #2. She held up 2 fingers. I cringed. About that time, she reaches into the fruit tray that her dad was eating. I snickered and turned around so no one could see me. If the toilet wasn't working, neither was the sink. There was no way for her to wash her hands. They kept right on eating the fruit.
After they left, I went back to survey the damage. It took a whole roll of toilet paper to clean it up.