Sorry, luckytso, I guess you will just have to wait a few years for the FW dinners/buffets. They are really very nice but are really not for young kids. You will enjoy the F&W festival very much though, there are tons of stands to sample all kinds of foods, beautiful flowers, toparies and gardens to see, a dog hedge maze and a great playground for the kids, you will all love it.
Another possible solution for child care is in room babysitting if you kids would go for that. I have never personally used this but have read many glowing reports on the boards from others who have used this. The sitter comes early to get the kids comfortable with her and I believe the parents carry a beeper, just a thought.