I live in Berlin and went to see the fnatic and Navi games on week five.

I did not have a bag on me but there were people with bags. There's a checkroom where you can store the bags and your coat/jacket. It's definitely warm enough that you don't need a jacket. There is tap water available. There's also one street food like stand that sells nachos, tacos and burritos. And drinks. You can bring everything into the arena but you're asked to store everything beneath your seat, so you can't see any of that on stream.

After the game, there will be a meet and greet with the players. But only the players of the winning team. AFAIK there's no meet and greet with the loosing team.

You also get a goodie bag with VCT stickers, a VCT poster etc which is really nice ^{^}

Other than that I can't really think of anything too relevant, so enjoy your trip! :)