Yes -- Le Cellier is one of the hardest ADRs to get due to its popularity! Keep that reservation!
When you check in, mention that you are a party of six and ask nicely to see if they can seat you together or, at least, near to each other. If you are polite and mention that you are willing to wait for a table to accomodate you, the host/hostess will do what they can to make you happy. (I gave you more detail in this response to your earlier question -
ADR made have question)
Good luck!
Eileen