Thank you to all of you who replied to this thread. I really do appreciate your kind wishes and support.
George will be waked on Tuesday, 2-4 and 7-9 pm, then buried on Wednesday morning. I had two vacation days to use this year, so I will take them on Tuesday and Wednesday, and stay with the family. My husband and son won't be able to take off both days from work and school, respectively, so they'll come to the wake Tuesday night then take off to come to the funeral and repast on Wednesday.
I'm trying to decide what to do to express our sympathy to George's father and brother (who is like my son's uncle and our cousin). I'm thinking about sending a small floral piece for the wake and funeral and sign it, "Beloved Uncle" from my son at least. I think there should be something like that from the children--George's blood nephew, my kid, and my sister-in-law's two kids. Do I talk to their parents about it or just do it?
Then I want us to do something for the family that isn't a "Dear Cousin" floral arrangement from DH and me. I'm trying to decide between sending a platter of sandwiches as I have an awesome deli to use or a fruit basket. We have to do something.
Honestly, this is a big loss for us. We've buried our grandparents and many aunts/uncles who were old; that's one thing. Theirs were lives to celebrate. OTOH, this man was our contemporary and an excellent uncle to our son and a friend to us both. He was present for most of the major events of our lives--wedding, Christening, First Communion.
I feel so devastated. Losing George is big to me; almost as big as losing my parents, my niece, Lori, and our other cousin, Donna, who was George's sister.

My heart is broken.