The Hague has two major train stations Centraal Station and Holland Spoor. If you arrive at one of these stations you can take tram 9 in the direction of Vrederust and stop at Melis Stokelaan.

From Holland Spoor another option is to take bus 26 in the direction of Kijkduin and stop at Melis Stokelaan.

From the directions: Rotterdam, Delft, Rijswijk another option is to take the sprinter train to Station Moerwijk. From there it is a 10 minute walk to the festival terrain. 

You can plan your routes in The Netherlands here: www.ov9292.nl