Berni,
i went to the games in portugal, and want to do a similar thing in germany, we got to the host city like 10.30 for the atmosphere in the main squares. id much rather stay longer through the day if possible.
because the main squares empty out about 1.30 hours before the game, and we dont wanna miss the chnace of flying our flag in the main square, and getting on TV!
Also is there big screens outside the grounds, where we can watch if we dont manage to buy tickets?
cheers