We have.
What sadly seems like eons ago now, we had some super fun times just hanging out with folks from this site when Julie used to organize Swingers Board meet-ups a few times a year. Sometimes they would be held where there was a swingers club to attend one night, other times she just picked a destination that seemed like a good one for a weekend getaway and we met up for dinner and pub crawling or whatever sounded fun. Anyone member could organize one, so there were some scattered far and wide, but she did the majority of them, and since we lived in the same general region of the country as her, we were fortunate in that most of them were in a day's drive for us.
We really really enjoyed those. It's something we've talked about trying to rekindle eventually. That was a long long time ago in internet years, so I don't know if the online forum meeting up in real life is still a thing people would be interested in nowadays, but back then, many forums did it.
We've also gotten together with people we know from here in sort of unofficial mini-meet-ups. Just like any other group of friends getting together - "Hey, are y'all busy weekend after next? Want to get together on Saturday night in Wherever for dinner and drinks?"
So to answer your question about pics, etc. For the official meet-ups, for those who had expressed interest there would usually be a PM chain or private forum or some way to set up the logistics and communicate with each other without the whole world seeing it. People would often share their SLS names there if they didn't already have it as part of their profile. Back then, if you wanted it to, your SLS name could appear below your avatar on all your posts.