Having lived on a boat for many years, I learned how to conserve water in an extreme way. I could make 10 gallons last a couple weeks, including morning coffee, (which seems to use a lot) personal clean up with a wash cloth, even dishes. I discovered that a dirty pot was easy to clean by putting a tiny amount of water in the bottom and heating it to boiling so that the steam loosened everything to the point that one paper towel cleaned it right up. Still, having more water is always good, I carry two 2.5 gallon jugs that fit nicely under the seat that supplement the 10 gallons in the installed tank. As mentioned, plastic tanks are available in a huge variety of sizes and shapes, Google is your friend.
Agile Ride improvement package