Watch the schedule, they will probably add a second run closer to the date. I was there on Feb 8th and they added a second run, it wasn't even that crowded.
If you do stay for the second run, hang around after closing. I was there with 3 friends that night and we hung around the front of the castle after Spectro. Spectro was at 9:00, which was also park closing. At 10:00 they had the "kiss goodnight". It was really special. An announcement with music comes on. We were the only ones at the hub except for a young couple. The cm's were cleaning up, you woudn't believe how many people abandon strollers! They were gathering them up. Aftewards we leasurely walked down an almost empty Main Street. The Emporium was just closing their doors, there were a few people inside. The rest of the stores were closed.