You'd be on separate reservations and each room would have an adult. Absolutely no reason you'd get connecting rooms. You might not even get rooms in the same building.
I understand you get a better deal if you pay for childs meals but have the adults use them but with this scheme you really don't have any ground to complain if your rooms aren't near each other.
With an 11-9-8 year old I'd think you'd want connecting rooms. Put everyone on one reservation, the meal plan will still give you good value, it just won't be as much of a steal as you were hoping for.