For me, it depends on the situation. We dry camped at a facility the had a free dump station. However, because I was focused on helping a buddy who was on his first trip, I fell behind in my own duties breaking camp. We had all planned to caravan the 120 mi trip back home. As a result, I chose to carry a full compliment of waste tanks back with us. The line was just too long at the CG.
The last trip we were on, there were many hills, a bunch of stop and go traffic, and it was twice as far away. I took the time to drop that unwanted ballast before I left the CG......
To answer the OP's question, I guess I have no real policy on the subject.
