Ddp & tiw

[CastleLight]

Help! I need some advice for an upcoming trip with our toddler. We have the TIW card. Since I don't think we will be eating at a full service sit down restaurant 3x/day this trip, I am considering also purchasing the basic DDP. I've run the #s and it SEEMS to make sense. I expect we will be eating more counter service meals then we would have before our baby was born.
What do you think? Have you purchased the DDP when you already have the TIW card?? Thanks!!