Priority seating is available. The need depends on the season and the events going on. When we were a VB in March, we used it twice; once for breakfast, when the space shuttle was being launched, as we figured (correctly) that there would be lots of people up early that morning; once for dinner when the lobby looked crowded in the late afternoon.
Remember, at Vero the general public seems to be able to come in and use the restaurant facilities. I saw several older couples or foursomes drive in with Florida plates who appeared to live nearby and just came for dinner. Thus the audience for the restaurants is more than just those staying at the resort.
Cap