Would you try to find your Long Lost Family?

I'm not in your situation, but I would say give it a go, providing you can be ready to accept rejection. I was estranged from my maternal grandfather( my mother's choice) and after the death of my beloved paternal grandfather (when I was 19), I often thought of him. He lived fairly locally, I knew people who knew him. I thought about getting in touch but feared rejection from him or his wife, and disapproval from my mother.
When I was in my early 30s he had a heart attack and one of my mother's aunts suggested she visit before it was too late. Mum did and then suggested I went, so I did, accompanied by my husband and 3 small children.
It was an odd experience, but not unpleasant and I mentioned visiting when he got out of hospital. He was very happy for me to do that. Unfortunately he died before I could visit again, but I was told that he had really enjoyed my visit and was proud of his granddaughter and great granddaughters.
I try not to regret the wasted years before I met him because I believe in his earlier years he was not a good husband or father, but I will always be grateful for the visit. At least I cannot say, If only.....