Oh, I also daydream about that all the time!
I actually had a dream about it once. But the dream ended up slightly odd. It started out with me seeing him in the airport and crying (pretty realistic there), but then we decided to
walk from Heathrow to Paddington.

We ended up stranded on the side of a cliff (I don't know why there was a cliff...crazy subconscious) with a couple of..well...rather chavvy girls. So glad that one was just a dream! I started laughing when I woke up at the thought of walking all that way (and with huge suitcases, no less).
During my waking hours, my thoughts about it are mostly like the first part of that dream. Seeing him in the airport, I'll probably start crying. I'm such a sap.

I don't know how long it will take to sink in and be "real" when it actually happens. I imagine I'll go through a period of thinking "Wow, am I really here?"
Edited because I just realized today you were asking for reunion stories, not dreams of reunion stories...hehe.