Maybe there'd be a way to have 29 threads but to archive all of them until the Brewers are set to go on a road trip to that place. I mean some cities are ones they visit once a year or even less than that. Like right now the only one you'd want active is Seattle.
It could help to hear directly from Brewer fans who've been there before on best places to park, best value seats, best restaurants nearby, best concession stands to visit, etc.