If you are not yet using professional tools, go to account settings and turn on professional tools. You can then go to your calendar and set up a rule with a minimum stay for the relevant dates, and mark all the days as "no check-in" except Saturdays.
This is a great question! Did any of the answers below help you resolve the issue? If so, it's always a lovely gesture to mark it as the best answer. It's like a big virtual hug to the member who supported you but also to support other Hosts who may have similar questions in the future. 😊