Hi @Sarah6154
You're using the Professional Tools multi-calendar, correct?
If I understand correctly, you can just delete the rule with the check-in restrictions on the specific weekends that you want people to be able to check in and out. In other words, go to those dates and change the rule to "none".
Unless there are other aspects that you want to control, there's no need to apply a rule to those dates and you can just leave it on "none".
You need to go to the guest view afterwards and double-check that this works as intended.
Let us know if this doesn't solve the issue.