I've gone the past two years for the Star Wars events, but I go to the first weekend, not the last one. My trips are specifically for the weekend so we do MGM on Friday and Saturday to ensure that we get to do all the shows and talks and autograph sessions. Last year it seemed that the characters were much more popular than the year before, with people waiting in line for up to a half hour to see the costumed people. The actual celebrities worked out great with the fastpass system. Overall, it wasn't too busy, but it may cut into some precious park touring time. I still think that with some circling of the park and creative fast pass management you can do MGM and SWW in one day. Our second day is usually the catch-all that allows us to see the other shows. I believe the last event of the day was over by 7:00 PM, so there is still some night time that you could use to tour. IF you look on star wars.com under the archives for June of last year, you can see some pictures of the crowds and what goes on during the weekend.