May 6th was empty. Space Mountain line was never more than 20 minutes, to give one example of how empty it was. Thunder Mountain, Pirates, Haunted Mansion, Buzz and Tower of Terror were walk-ons all day long. Toy Story Mania was 30 minutes in the peak of the afternoon.
Only Splash Mountain had a line, but it was a very hot day (oddly enough, though, when the line was around 45 minutes, the fast pass return time was in 40 minutes).