Yes. She borrowed a number of phones to stay in touch with her friends throughout the night. Including, if I understand the timeline correctly, the one she used to ask her friend to return and get her. When the friend did come back and look for her, at around 3 am ish, it was about the same time she was seen walking to the "parking area" with the guy in the sketch. That was when she was last seen, according to LE. If the convenience store siting is true, then that would give them a direction to go in. If it is just a rumor, that would mean less, but something still, depending on the source of it.
I think the most important party goers to reach would be the ones who were there btw 2 and 3 am, coming going, leaving, hanging out by the road area. Hope the security cams pan out.