Is there no problem dumping grey water on the ground in campgrounds? My grey water doesn't have food particles or grease. It's only hand soap, or dishwashing soap.
I didn't read all 4 pages of this thread. But, as said it is illegal and not allowed by the parks in my area. Also, the water would make the ground squishy / slippery and attract more bugs. Sure, when it rains this happens too but, why make the ground wet when you don't have too.