While my post of finding teammates isn't that old, I'm getting antsy so I'm posting here, too.
Do people usually bring their own teams, or do they also post recruitment posts and cross their fingers?
Or is it that almost every participant already found teams and were working months ago?
I wouldn't know of having a team months ago but a lot of recruitment happens through discord or gamedev sites like lemmasoft and such. The jam forum isn't all that busy in that aspect. I think most posters do find a team, though.
If you really wanna find a team, might be better also try different places or add more info than 'let's hope for the best' since people tend to like specifics, even if it's just a premise.