Is the baby still able to be put in a front carrier? My twins were small so I carried them in my front carrier for a long time. I can remember eating a meal with a baby sound asleep in my carrier -- I removed her when it was time to eat, and she continued to sleep in a sling on our lap and when she woke up just kind of sat there on our laps with no problem, so she didn't take up any extra room at our table. I'm not sure exactly how old your child will be at that time or if that's even an option, but just thought I'd mention it. If you go into the ADR with a table for 4 and a baby on a lap, it might work for you. However, in the meantime, I'd call to see if a baby can be added to your reservation. Good luck!