It's easier for me for two reasons. First, they were friends before play partners. Second, there were only five couples that we played with.
But, sadly, that was back in the late 70's/early 80's and we didn't have access to computers, cellphones and digital cameras. So there was no correspondences or pics to have kept. Communications were mostly in person or by telephone.
Years later though, I did make a diary of those experiences to best of my memory.
Now we did play online with a few couples years later. That was about 20 years ago. And, stupidly, we didn't keep any of the emails or pics we exchanged. Well, actually, we deleted them in consideration to the couples who sent them. But, dang it, I'd sure pay a bundle to have them now.