Just an FYI don't just try to walk up at night, we were there several weeks ago on a Tuesday night and had a priority seating at 7pm, we got there at 8pm and they honored it with no problem and it was about 45 minutes until we got a table. While I was there people walking up were told it was 2 hour wait if they did not have priority seating.
Last year we made our reservation the morning of at the booth inside IOA without a problem, we usually will wait until we are at he park in the morning to do this. I know those that live there might not have been turned away But it seems that every year when DH and I go and we don't have a priority seating reservation made we usually regret it