If you have room, I'd consider adding a grey tank. I wouldn't just dump the grey on the ground. You can buy a storage tank with wheels. Check out camping world for examples.
I think most of us dump our fresh water on the ground when we are home, or at our storage location. Sometimes, I dump the freshwater into buckets to water plants.
'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 DS, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Bags, Toyo M655 Gs, Curt front hitch, Energy Suspension bump stops.
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