Getting reservations at DLR is much easier than at WDW, but it's becoming more and more important to have one if you know you want to dine at a specific location and/or time. You can often get pretty good reservations on short notice (~week), except for dining packages (especially F! once it goes to weekends only), dessert parties, special events, and the Blue Bayou. If they have space, the TS locations will take walk-ups, but the wait time can be fairly substantial (30 minutes to over an hour are not uncommon).