I would probably not do an ADR any earlier than about 8:00. Assuming that your flight arrives on time, you will hopefully, then, have a few minutes to settle into your room before heading out to dinner. It's possible that you'll find that you could have scheduled earlier, but there are a couple of things that could "extend" your schedule. A late flight arrival. Long lines at check-in. Even if those things happen, you'll probably be able to make n 8:00ADR.
If you really want to have a comfortable time schedule, you might consider dining at the Wilderness Lodge that first night and saving the others restaurants for another night. Just a thought.