How do I remove a bus from the transportation form so campers can't select it anymore?

Manage your transportation form settings via the corresponding transportation "session group" for that form.

To remove a bus from the form:

1. Go to the Transportation Dashboard
2. In the top right section of the dashboard, click the name of the relevant Session Group
3. In the Session Group, scroll down to the Arriving Buses and Departing Buses section
4. Double click the pencil icon next to the bus name
5. Set 'Available on form?' to No and submit

Note: if the delete button is available for the bus, you can also delete the bus from the form. Buses are not deleteable if they've already been selected by at least one camper.