I only told my parents and inlaws, but specifically asked them not to come that evening, and to wait till the next day. They were cool with that, and especially as my sect was booked for late afternoon, it was difficult for them to fit in with hospital visiting times.

I dont think there is anything wrong with keeping it vague, there needs to be some kind of surprise with a planed section I personally think. And you it is so much better to face everyone on your own terms. Good luck with it.