I have a separate hose to take a little gray water out of the tank at a CG. I usually lead the hose down an incline away from other campsites or find a bush to water. In AZ it evaporates pretty quickly and I usually water the foilage at night.
2011 Jayco Flight G2 23FB
2008 Dodge Ram 2500 HD
1500Weight Distribution System, Accupower Pilot Brake Control, Sway Control, Husky Elec Jack