Maybe make a new post (LOCK INSTANTLY, ONLY UNLOCK TO BUMP) saying: "Any other teams wishing to participate in the Holiday Tournament send me a forum MSG with the following details 'team name, roster etc.'
And that way you just have that thread continually updated, just writing "bumped" when you need to get it viewed, then locking it again. Only you would get to post, so its only relevant. Or even better, keep it locked - but Jitspoe Stickies it so it stays on top. That way everyone can easily find it, and you update it as updates are necessary.
Then there can be a separate thread for discussion, which you can choose to ignore or read when you have time. But when people need to find information, they don't need to check the 10 page thread, they just click the single post of all information, that is stickied/locked.