The confirmation of Minnie at LTT, leads me to say that if you kids will be disappointed if they find that Mickey isn't there, then Chef Mickey's might be a better bet.
I enjoyed dinner--but some posters suggest that breakfast is better, so perhaps a way to start your trip before you hit the parks! (Saves money too as it won't cost as much--and hey--maybe even LTT for dinner--of course, that will be bunches of bucks to do to CMs in one day).
Garden Grill is yummy and the restaurant rotates--pretty much makes a full rotation (very very very slow) during your meal.