I have just tried somthing on this trip. When doing a day trip from one campground to another I will leve my black tank 1/2 to3/4 full. When I get to the next site I then drop the tank. I have found that the sloshing of the trip breaks up everything. Then I drop and flush well.
2014 Columbus 320RS
2011, Ford, F250 srw, 6.7
Life member GoodSam, KOA, F.R.O.G