Oh, I don't think I'd have a party, either. But I would and have made sure that the affected people know where the will is and who is to execute it. This is no time for pretending that people who have been nothing but trouble during your life will suddenly 'come to' and start acting like sane adults.

My husband and I made up our wills long ago from a defensive posture. Nearly all of our relatives are so crazy that we wanted to make the sure one sane one would get custody of our kids if something happened. (Fortunately this is all moot now, but it sure worried me back then).