I will get in around 7:15pm before the fireworks at 7:45pm. Event is from 6:30pm to 11pm. There's usually a line to get in, so arrive plenty early if you want to catch the fireworks.
This is a very dressy event. Great event to meet people.
The food is pretty good but alcohol is really expensive for very small cups. I would suggest pregame elsewhere and come to Trump buzzed. :-)