The department at the university I plan to attend has invited me to a Preview Day - with a week's advance notice! I will be doing a PhD there, and plan to accept but am still waiting to hear from one final school. It's a small department, and I have been told there are plenty of assistantships to go around, but there is one professor in particular I hope to work with. I emailed her about a week ago to make a connection but haven't heard back, though I have heard she is quite approachable so I'm not too worried.
My question is, how necessary is it that I go to the Preview Day? I live abroad, so it will be a considerable expense, but if it will be really helpful (or noticeable if I'm not there), then I will make it happen. It is a half-day event and is for all of the Masters and PhD programs within the department.