Okay, first of all I always make reservations so that I never have the slightest chance of having to wait. There's nothing like having to carry a tired, hot, hungry toddler for another twenty minutes while standing with hurt feet and a painful back. It doesn't cost you anything to make the reservation or if you don't make it. It's just a hold.
Now with that said. Depending on who you are going with and what kind of meal you are looking for here's what I would suggest.
Tony's Town Square - very nice semi-elegant italian food - Lady and the Tramp decor.
Crystal Palace - character buffet, great for little ones and above. Great variety of foods with the Hundred Acre Woods friends.
Liberty Tree tavern is very nice, character family style meal. However sometimes the service and portion sizes can be unrealizable.
Whispering Canyon Cafe - this is at the WL. I haven't gone there yet (going in Dec), but I hear it's great. There's a skillet that's to die for.
My favorites that I would recommend to you is either O'Hana or Chef Mickey's.
O'Hana - book about an hour before the fireworks - it's at the Polynesian and serves delicious flame cooked hunks of meats and shrimp. You have an amazing view of the castle expecially during the fireworks.
Chef Mickey's - character bufet, excellent variety of food, amazing desert bar. Whooping it up for everyone.
Read the reviews on the allears.net and here and then decide for yourself. Good Luck