I met my biological father when I was 19 and had all kinds of emotions and experiences. At the beginning, things were neat. I was guarded though, because it felt awkward to have someone that I never knew anything about, but suddenly was very important. I knew who he was at the airport without ever having seen him or planning what we would wear, and he was nervous too. I tried to stay cool, and just get to know him and stuff because I realized all my preconceived ideas were out the window. I called him dad to his face, but always by his name otherwise, because the man I called my dad was the one who did all the real work after he adopted me. Our first meeting, I was 19 and went to his home for Thanksgiving week. It was nice, a little strange, but nice. A few years later I saw him again when we went on a trip to Italy. That was mostly cool, and though I saw things that hinted to why mom divorced him while I was a baby, he was pretty good. But then a couple years later we had a huge falling out and he hurt me (or made me mad? Still haven't decided?) and we didn't speak even though he tried, for several years. When I found out I was pregnant, I got back in touch with him because I was his only child and I didn't deem him bad enough to never meet his only grandchild, and he lived in Europe so it was "emotionally safe".
We've since been fine. Like I said, distance is safety for my emotions, which I do tend to guard. We send emails and phone each other every month or so. We went to England on a trip last year and made a stop where we met and spent the day with him and his wife, and it was nice. He was very nervous, kinda like a 14 year old on a first date, but the trip was sweet. It was good that he loved my husband and bragged on him a lot. It was cute the way he just stared with an almost visible lump in his throat at my baby in his infant carrier. He was on his best behavior, and I kinda almost felt bad for him. Glad it happened. I think the key is to take everything for what it is and not allow your brain to work things up in your head that aren't there, or a future, or creating a hero on a pedestal. That wouldn't be fair to anyone involved. Enjoy your trip; it will be special.