The idea on the timer here is they can talk someone into going, if they don’t want to risk the short straw themselves, or they can plot to send someone over with the Mendl’s. The binoculars confirm the swap is immediately after this tribal so that info is out there.
Edit: but this is still not a “solve” of the kidnapping because also there’s reason to keep the Mendl’s in hand for the upcoming swap if you know it’s coming.