Calling can't hurt, BUT I wouldn't rely on it either way.
When you check in, tell them about the celebration. Then, when you are seated at the table, tell the server about the celebration. You may even need to remind him or her before you leave.
The restaurants are VERY busy, and no matter how well meaning and hard working the CMs are, it's very easy for them to forget things. As long as you are polite and kind, they won't take offense.