Daines did say this:
Daines told The Associated Press Thursday in a statement that two things are going to happen this weekend: There's going to be a new Supreme Court justice and Daines is going to walk his daughter down the aisle.
That seems to indicate to me that he's got the vote thing worked out - they either don't need his vote or he'll be busy traveling on Saturday & I'm sure somebody has a private jet they'll let him use.
They can’t trust the vote count until all the votes are in. He can’t leave based on a promise from Flake or Manchin. The best he could do is be an hour away on a jet and if someone backstabs, he can turn around in the air and return. McConnell can figure out a way to hold the vote open.