LTT is the only sit down restaurant that remains open after 6pm. You can get Tony's, CP or CRT up until 5:45 I believe. These restaurants do shut down at 6pm, but obviously you are free to stay until your meal is finished. They do not re-open. Dining at a nearby resort restaurant is also a great option. I know the GF has the Cafe which is very casual and you can order items like cheeseburgers, salads, all the way up to steaks. There's the Trailside Buffeteria at Fort Wilderness if you want to control your own eating schedule and not wait for it to be cooked and served.