It is important to input your campground/park's cancellation policy to set correct expectations for campers thinking of reserving a site at your location. This way there are no surprises in case the traveler's plans change, or something comes up where they cannot make the trip.
The first place to find this will be in your RoverPass owner portal.
See screenshot below:
The other spot you will want to add them is also found in the control panel.
See screenshot below:
Now your cancellation policy will be shown to your camper in two different spots.