If you are lugging all of that water mass along you could store it in a jacket around the crew compartment, providing additional radiation protection for most of the trip.
You're going to need humongous solar panels to support this, but since you are in space this isn't an intractable problem. A small but constant acceleration would probably make life better in the spacecraft as well.
You're going to need humongous solar panels to support this, but since you are in space this isn't an intractable problem. A small but constant acceleration would probably make life better in the spacecraft as well.