RV dump stations

I must retract what I said about dump stations in California. I have seen some and thought most all have them. I have never used them and they maybe shut down and I never noticed. I know of several servace stations in my area that offer free dumps. Yes some RVers have given RVers a bad name when it comes the our gray and black water. It must be 30 years ago I was reading about RV in the Lake Tahoe area that were dumping in the middle of Casino parking lots and streets. Laws were quickly made it illegal to park RVs on the streets and Casinos parking lots. I was at a RV park where some just dump in the creek next to his site. He left one smelly mess. I have heard of people dumping while driving down the road, so now it is illegal not to have a cap on the end of your pipe while driving in California. The trip I am planning I will be stopping at any places that do not offer dump station, so I will have to find some place to stop and dump. I was hoping some states offered them at rest stops.

Thanks

Buster