Those days are typically lower crowds. We went to one of those super early closing days on the night of a cast event and we had a great time with low crowds. Keep in mind for those kinds of events it will be a hard close with everything closing right at 4:30 including all stores and restrooms (they were telling people to go to the restroom outside of the park) they will herd everyone out right at close and it will be as body to body as the end of fireworks with thousands of people all leaving together. I think it was definitely worth it!