After-hours calls fall into three groups: things that can be handled right now, things that can wait until morning, and things that can't wait at all.
Scheduling, directions, and general questions can be handled immediately. There's no reason a customer should wait until Tuesday to book.
Quotes, billing, and anything that needs a decision can wait for the team, as long as the message is complete and the caller knows when to expect a reply.
Anything urgent should go straight to the on-call contact. Write these three lists down, and you have an after-hours policy.