I have read several responses to the OP that are of various quality concerning septic systems. I was the lead editor of TEX*A*Syst Ground Water Protection Program released 1997. My expertise is Pesticide impacts on soil and water, the Household waste document was written by a PhD environmental engineer and approved by the State of Texas. The TEX*A*Syst program was based on the Wisconsin FarmASyst program and reflects Texas laws and policy.
https://blackland.tamu.edu/decision-...ter-treatment/
"The design and construction of septic tanks influence their water tightness and effectiveness at retaining sludge and scum. Multiple tanks or chambers in series can improve sludge and scum removal. Gas deflectors and filter screens or inclined-plate settling units help to minimize solids entering the drain field. Tanks should be sized to accommodate at least 24 hours of wastewater flow while still allowing for sludge and scum retention. Pumping the tank before it is more than one-third filled with scum and sludge (generally every 3 to 5 years) improves the functioning of the system. When the tank is pumped, you should have the baffles checked and also check for tank leaks."
I see no reason that you can not occasionally dump small amounts of your RV Blackwater into your home system. however frequent use is not advisable and may result in the need to pump your septic system more often. also, typical home systems are not designed to handle large volumes of liquid per day and may cause environmental damage. I pump our home system every 7 years, larger families should have their septic systems pumped more often. If you allow your system to fill with sludge it will plug the drainage field pipes. If your septic is full of sludge and still flowing, your sewage is draining directly into your local ground water or stream and you may be subject to state enforcement of environmental laws and significant fines. Our local septic pumpers charge $250-300 to pump tanks and haul it to a local city sewage plant for proper disposal. Replacing your drainage field will cost hundreds more and require permits and inspection by local and state environmental agencies who may also require additional expensive upgrades to your system to meet current laws.
You do not need to add enzymes to your septic system, Natural biological process are sufficient. If you have additional questions please send me a PM; I am retired and the email address provided on the original documentation will not get you a response.