For those of us that are not connected like @bonnie (good on ya'!), here is what can be expected by just showing up and walking around: SpaceX visit tomorrow? SPOILER: it is awesomeness wrapped in geekiness!
Pure dumb luck: Meeting Gwynne Shotwell. Experience: When she offered a tour, I didn't hesitate. I believe I responded with, 'OMG YES WHAT TIME SHOULD I BE THERE??!!'.
Congratulations. She seems like a very cool lady from all the interviews and presentations she's given.