I have two 42 gallon grey tanks. One is for the kitchen sink.
The other for the main bathroom.
I have noticed that the kitchen grey water smells bad. Not so for the bathroom. It actually has a slight pleasant smell.
The kitchen one fills slowly and has a much higher concentration of oils etc to the water. The bathroom is mostly shower water with a little soap in it. It fills much faster.
Where it is permissible I will let some of the bath water out if I need to.
Now my camping is ALWAYS boondocking at mostly remote locations, but even if I had a neighbor right next to me, he wouldn't know.
