Our general rule for dining with the kiddos anywhere..."if they offer a kids menu...." Now my boys are older (10 and 12) so we can go anywhere!
Only you know your kids. For me, I couldn't take them anywhere...even Mickey d's at 8 or 9pm! It was passed bedtime and they wouldn't have sat for a second!
They weren't nappers on vacation!!!

I was always amazed when I saw kids out that late sitting nicely and eating dinner!
At 5 or 6pm, we'd be okay. One thing that always drove me nuts, was when a waiter would bring their food first. (I started telling them not too) Once they were not hungry anymore they just wanted to leave. That left me and my husband shoveling food down our throats. I found them easier to entertain when they were hungry!
I'm sure you'll be fine dining at most places in WDW by just using your instincts. have fun!!!!!