Black water disposal for permanently parked RV

Thanks again for all of your replies. I am planning to check with the county about the RV being parked there, as well as grey water disposal. I was also going to get a new septic system in a year or two to allow for more users. And if the county and septic company engineers say it's ok to run the waste from the RV into it I may do that now rather than in a couple of years when we do an addition for my Mother-in-law. Thanks again.