The death of your Daddy brings back memories of the death of mine. I have no wings to reach him anymore, for no wings can bring me where he decided to vanish in the very deepness of the sky. To reach him I can only vanish myself totally.
I sense from my little being that your father is in good hands, surrounded by a nice lineage of hold souls with your grandma and others. Maybe he will come to you like your grandma did in a dream.