In recent years, it has become increasingly difficult to walk up to a sit-down restaurant and be seated for a meal. Table service meals are in high demand and that is why Disney has an Advanced Dining Reservation system in place to make it easier to dine in the establishments you choose. Walt Disney World suggests that guests begin making reservations 180 days prior to arrival. Yes, I did say, 180 days. It seems like a lot of time beforehand to start thinking about what and where you want to eat, but if you have certain places you definitely want to try, it is highly recommended.