IF the vapor barriers are functioning then you should have NO stink inside the RV .... except for whiff during time that toilet ball/blade is open (flushing)
Stink inside an RV from waste tanks (black/grey) is because something is wrong not because waste is in the tanks.
Toilet floor flange....toilet loose/gasket crushed
Toilet bowl seal......doesn't hard water
Sink/shower 'P' Traps....dry
Air Admittance Valves (under sinks -- on drain line after 'P' traps)....not closing
Waste tank vent lines.......broken/pulled from tanks