Around 1 liter is generally enough. However, if it is a well attended competition you may need more. Generally 3 x standard 440ml craft beer bottles recommended. Bring them cold if you can, but if not we can always make a plan.
Exactly what it says. Bring any beer you like, any style, any brew method. You are judged by the other members purely on how much they like your beer. Vote for your favourite brewer of the night and win great prizes!
All BJCP information can be found at the bjcp.org website