Most of the USFS/USDA campgrounds near here do not have dump stations. Many of the State Parks don't, either. Therefore, we frequently leave a day early and spend the last night at a full hook-up RV park. That way, I can dump the next morning in the privacy of my campsite without waiting. I can spend as much time as I like flushing and cleaning up, then go home.
The nearest dump station to home is five miles away, the next nearest 10 miles away. There is no practical way to get access to the home septic system.
The final night in a FHU RV park is the best bet for us, IMO.