Travel
Trains: the "St Charles" railway station is close to the center of the city (map)
Planes: the Marignane aiport is connected to the St Charles station by a shuttle - general links
Accommodation
You can find easily a number of pleasant hotels close to the "Vieux Port". 
Hotels in Marseille: selection - hotels_1* - hotels_2* - hotels_3*
If you don't know Marseille and want to discover with images or want to visit ...
Fees & support
- Fees: a financial contribution will be asked the participants ~ 200 Euros (TBC)
- Financial help: should be possible for some young people (we are waiting for sponsor answers)