So today I got that set up, and screen helpfully tells me
There are several suitable screens on:
Type "screen [-d] -r [pid.]tty.host" to resume one of them.
I've been reattaching them one by one, and each time there's a flash of recognition in my brain. "I remember this! This is from when I was working on such-and-such idea, and poking around in xyz directory, and oh wow, that was two weeks ago! I did this and that, and there are still unresolved issues a, b, and c! Ah, here's a scrap of email I was writing! Here's a half-edited config file I've since rewritten! careful, don't save that."
And so on.