Take a dump.... Yes, its OK..
I have a specially installed "clean out port" on my septic tank. This keeps the local health department off my back by calling it a "Clean Out Port" :-)
Its so the local septic tank company can pump out the tank, which if designed and maintained properly should never be required.
I drop the hose into the clean out port, which just happens to be beside the RVs parking spot, open the valve, and let it go, just like I would at any dump station.
I have an older septic tank, 750 gallons. dumping 30-60 gallons from the RV is nothing. The only thing I would caution is the use of any chemicals in your RV. If you want to use anything, use Rid-X. Its good for the septic system
2001 Coachmen Mirada (Ford F53 6.8L V10) - Toad 2001 Civic
It won't do MACH 2, but I can get a sandwich and take a pee.