I would wait and announce around New Years.
I agree... then you could do some kind of "new year, new beginnings" thing about the new journey or something... might be best to wait a little while.
I like this idea.
If you're worried about showing and family members finding out at the funeral, I wouldn't stress over it.
DH's dad died days after we got engaged and we hadn't had a chance to really tell anyone yet. At his funeral several people noticed my ring and started asking about it. I hadn't even met anyone yet so I thought it would be really awkward, but it gave people a chance to smile on what was otherwise a really difficult day.