I agree with the comments on calling it clean out. Anything else may have your jurisdiction looking with more scrutiny and probable a permit fee.
Two years ago we had the sewer line replaced t our home. The plumber put in 3 clean outs with sweeping el tees do the snake could go either direction if needed. One is opinion the parking strip near where we park the RV when it's home. The city even put a cast iron cover marked sewer on it. If the place where we store it didn't have a dump station I would have a macerator. Still may buy one some day