Daisy06492,
Don't worry about attire - I've seen people very casual, somewhat preppy, and somewhat dressed up. Regular CityWalk restaurants seem to be a lot more casual then Emeril's and Tchoup-Chop. Most guys I saw at the latter had polo shirts on, while some ladies had sun dresses or just a nice tops... but still very casual. Only one time I remember wearing a "little black dress" when we went to Tchoup-Chop with a couple of friends.. but it was a rather preppy dress - nothing fancy, that is. My DH normally wears a polo shirt, a nice pare of jeans and a pair of semi-dress shoes (you know, Reaction-type, but he is not a sneakers-type guy anyway). As long as you adhere to Emeril's dress code (which is really a "common sense" dress code anyway), you should be just fine. The rest of restaurants are super casual (I mean, tennis shoes, shorts, tank tops...)
I personally don't like going to restaurants right after coming out of parks. It's always nice to go back to the resort, take a leisurely dip in a pool, shower, dress up just a little and then have a dinner adventure. But that's just me - I like to savor every moment of our vacations, even when it's just a long weekend getaway.