One of my non-sailing friends asked for details on this trip to Hawaii and I couldn't for the life of me figure out what he wanted. I listed all sorts of details on the boat and the crew list and that sort of thing. Then another friend wrote back what was probably blindingly obvious to everyone else.
"How do you cook and sleep on something 47 feet long?"
I answered that question but also added the more important one, how do you stay clean for 2 weeks with rationed water?
Simple, keep a bottle of this in the cockpit. You see a squall coming, you wash your hair. Then enjoy the rinse when the rain starts. If you get stuck without enough water to rinse, it's a bucket of saltwater for you.