Making phone contact might be good; if it gets too edgy, you can always make the excuse that there's somebody at the door or some such. If you really were friends before, then it could work out well. If they've still got links with C Geer, or G Wrenn, I'd be somewhat wary. There's a thread about Wrenn somewhere here; and plenty of words about Geer.
I reconnected with my Corps sister after many years; we had a good time together and remain friends. Most of 'em I wouldn't particularly want to hang out with again.
On the other hand, I hooked up initially with some ex-Wayfers and it was as if they'd never left, with all this excessive "the Word says" and "doctor taught" stuff. Impossible to talk to! They hadn't been in anywhere near as deeply as me, and couldn't understand the immense hurt and damage that had happened to me. LOL, they had a big meeting and some guy (Rev Lightfoot?) came and talked. I mentioned something to him afterwards and he latched on to that, and proceeded to talk at me (not to me) for I think about 20 or 25 mins. Didn't seek any input or response from me; just wanted to tell me why I was wrong (which I wasn't). At first I hid my amusement at his long-windedness; but then I simply walked off.