Information about Turku and Finland
Practical information about Finland can be found here. In a nutshell: ATMs (called "Otto" in Finnish) are common and accept major international cards. Most shops accept cards as well. Banks are open on weekdays (Mon-Fri) generally from 9:00 to 16:00. Many Finns speak good English.
Early september is part of the summer in southern Finland, and it is not (yet!) cold and dark in Turku during the time when SMBM will be held. The day temperatures are expected to be between 20 and 25 degrees Celsius.
Travelling to Finland
Turku has an international airport with several daily connections to Helsinki, Stockholm, and Copenhagen. A large number of airlines offer flights to Turku through one of these three hubs. The airport is 8km from Turku (location on the map) with regular local bus connections to the centre. The bus takes about 20 minutes and costs 2,50 euro.
As an alternative, you can fly to Helsinki which is about 170km from Turku. There is a direct bus connection between the Helsinki-Vantaa airport and the centre of Turku. The bus takes about 2h30m, costs 26 euro, and the timetable can be found here.
If you feel adventurous, you can fly to Stockholm and take one of the large cruise ships that sail twice a day between Turku and Stockholm. The cruise is a great experience and you can also visit Stockholm at the same time. The cruisers are operated by Silja Line and Viking Line.
If you come from within the Baltic region, you can take a train to Tallinn, the capital of Estonia, and then one of the numerous ferries to Helsinki.