Catholic, or not Catholic we can never know, while living this life, who will and will not, go to heaven for that is beyond our knowing, for we all live in hope of our salvation. So, it is no more a danger for us to live in hope that any of those dear to us will be where we ourselves hope to be. It is just as much of a danger, if not more, to say who will not be there.
Yes, the Church is necessary for salvation, but we should remember the Church is more then what is always visable to us and God’s mercy is beyond our individual understanding. So let us not cause undo worry, and leave all final judgement to our God.
For all us which make it to heaven, which I live in assurance of that hope if I finish the race, believe we will be very suprised as well as full joy to whom we will share that joy with.
All funerals, IMHO, should be celebrations of hope, for it is not known to those of us left what went on between the deceased and our God at the moment of death. Thus our response to death should be one of hope and not despair.