We (parents) have been to a couple of these. I would suggest going if it's not inconvenient for you. Usually, this sort of event would be hosted by one or more local alums. You just never know when it might come in handy to have met the local alums as well as the other local new freshmen and their parents. At the very least, you might bump into them on campus - or at the airport - and it's nice to be able to say hello. The kids may sometimes end up on the same flight and may share an uber back to campus, for example.