We carry to 5-6 gal gerry cans that I have bunge corded to the top of the front basement (above the landing jack rod). With my short hoses (10' & 25') and a funnel I can fill these 5-8 times and refill the freshwater tank on our 3400 RL. If it's a long way in the campground I use either my muscular nephews or grandchildren. In a real pinch I will lift them myself
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It really doesn't take that long. We have a family reunion once a year, and all of the nephews and other RV owners in our group use our gerry cans.
Take care,