It would be deeply triggering to see him and he is extremely manipulative, plus he has friends that attend the scene. Some of them were doing meth last I saw them over ten years ago.
If I make friends, they could easily link back to him through themselves or multiple people. I seriously cannot tolerate that. I don't want him knowing anything about me and my life.
Do you think I can manage being part of a small scene with these conditions?
Ultimately only you can really tell if you can handle it. I would say go with a friend, have multiple exit plans, and don't force yourself to stay in a situation where you're uncomfortable. If you catch wind he might be there and you don't think you can handle the stress, bail. That's what I'd do, anyway.