When we inquired a few weeks ago while there, you just showed up at the right time in the lobby for the morning tour - it was listed on the activity sheet they have each week, too. There was no need for advance reservations. If you aren't staying at WL and want to tour, you can just call from your hotel to ensure they are offering it the day you want to go.
They were not doing the food one, just the morning Lodge tour, when we went and they said the later one has been canceled...