Even though you weren't very close, I'm sorry for your loss. Blood is thick, and it will hurt even if you don't expect it, or even want it to.
As far as going down there, its hard to say. If he had gotten that far away from being the man you remembered as "Dad". Then I probably wouldn't go, and save the memories of when he was the man you remembered.
I don't know if that helps at all, but again. I'm sorry for you and your family.
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