Not a question but an observation. Me and himself are estranged from various family members for a number of reasons. Himself has found out today, via a third party, that his estranged father has advanced dementia so even if he did want to reconnect with him his dad wouldn't know who he was. If you are estranged from anyone maybe you should have a bit of a think about it (today's news hasn't made me want to reconnect with my biological dad, but it did make me think).
Sherr, if he is seriously considering visiting his Dad, I hope that he can find out where he is living. More likely to be in a care home, I'd think. If so, maybe it would be possible to call there first and talk to the people caring for him to pave the way? Good luck with the search x