No matter how you do this the issue is to pump water, not carry it. All the pieces of the water handling system need to be maintained so they dont mold. When you are done dont forget to also bleach your hoses. You may drain them but you could still see mold form in them. The first clear hose that I used when adapting onto my winterizing port developed mold spots in it. I drained it but the next time I went to use it there were black mold spots in it. If I'm storing my fresh hoses for any amount of time I give them a shot of bleach and water and connect the ends together and roll the mixture around and around.
All of this is especially important if using well water but I dont depend on the amount of chlorination in city water.
