During my various travels and living in a very hot place without air conditioning this summer I have discovered that all I need is a small 12vdc fan blowing directly on me. That's it. If I have that I can sleep like a baby even when temperatures soar well above 100 degrees F. As long as I can get a good sleep I do okay.
You'll be more than OK converting your boat into a 110v wind tunnel!
Nail, do you have a manual grain mill ? Love mine!
What can you do with it? How much space does it take up?
I highly recommend a product called "True Lime", there is also a "True Lemon", both available at some grocery stores but I have not found it at Walmart. It is basically crystallized lime, a natural product, just a powder in packets that you can add to drinks and other foods to give it some pep, and it also masks undesirable flavors such as the plastic flavor water storage containers leave in the water after it sits a while.
I will definitely follow this up. My life revolves around powders now. I have been doing kool aid and splenda in a blender bottle and I'm ready for a change that doesn't stain my teeth.
Sundesa Blender Bottle Orange - 28 oz. - LuckyVitamin.com
BTW, blender bottle, good stuff. Good for mixing pancake batter.