A self-contained campervan is a campervan that has all the necessary facilities for living, such as a fresh water supply, a waste water storage facility, and a toilet, allowing travellers to camp without needing to use external services.
More info about what self-contained means for Spaceships campervans.
Spaceships campervans come in self-contained and non-self-contained versions.
Read more about the differences between a self-contained and non-self-contained campervan.