I think it's kind of silly to plan the whole dining experience around the few restaurants that don't have a kid's menu. If everyone wants to eat there, that's one thing. But if you're eating somewhere that wouldn't be your top choice except for the "bonus" fact that your child will get an "adult" meal, it doesn't really seem like such a bargain.
If you just pick places where everyone likes the food, and pay OOP for a couple of adult meals, you'll still come out ahead with the plan vs. without the plan. (Assuming you do all your TS's & snacks.) Then you can use the child CS's for breakfast! The kids' breakfasts look good, and you won't feel like you're letting anything go to waste.
That said, I don't think there IS a best CS for kid's meals. They all pretty much suck.