I realise most folks can't do this but after dumping at the CG I will fill my black tank 1/2 full and head home, I live on a farm so a tinny bit of yucky stuff in the cow pasture just blends right in, so when I get home I will fill the black tank the rest of the way up and hook up my super long hose and drain it into the gravel filled hole I have just for the times I use the camper after leaving the CG, there is a suprising amount of paper that comes out even after dumping at the campground, I would imagine if a guy could fill the black tank up before dumping at the CG it mite clean it better.
I do the ice trick once a year just for the heck of it.
