Ashley,
As with all things Disney, the answer can vary. I have seen this done in a few table service restaurants, and it clearly was no problem. At others it will be a clear no-no. Buffet and family-style service restaurants are two prime examples. In these it is not so much a problem with the food being brought in, as the fact that they have to charge you for all parties at your table.
My question though is why you would not have your 3-year old eat a table service meal with you there? If you are on the dining plan, then all three of you have to be on the same plan (of course the 1 year old, being UNDER 3 years old, does not have to go on the plan). So the assumption is that you are going to have the credits needed for him to eat right there with you.
But on the assumption that I am missing something and you are still motivated to do this, I will suggest the following plan of action;
Don't do it
- If it is a signature/fine dining establishment
- If it is a dinner show
- If it is a buffet
- If it has family-style service
If this raises any follow-up questions, please write me back and I can offer more specific advice!
Have a magical vacation!