How do I get to Dekmantel by Day through means of public transport?

Train: Take the train to the airport (Schiphol) and from there you take bus 199, this bus will bring you in approximately 20 minutes to the festival site. The bus stop is right in front of the campsite (which is adjacent to the festival site). The Dutch railway operator NS has special discount ticket offers available for people travelling to the festival from other parts of Holland, check it out here: http://dkmn.tl/trainticketdiscount17

Bus: From Schiphol Airport you can take bus 199, these go about every 30 minutes and stop at a 6 minute walking distance from the festival site, the stop would be Camping Amsterdamse Bos. From Central Station Amsterdam you take bus 172 to “Bus station Amstelveen”. Here you transfer to bus 171 and get off at ‘Bovenkerk/Schinkeldijkje, from there it’s 5-10 minutes to the festival site by foot. 

Other busses and routes are also available but not recommended (as it’s a longer walk or you could get lost in the woods).

Metro/tram:
Take metro/sneltram direction ‘Westwijk’ and get out at ‘Brink' and take from there bus 199 direction ‘Schiphol’, this bus stops right in front of the campsite, which is adjacent to the festival site.

Actual routes, schedules and times can be found via  http://9292.nl/en and Google Maps.