Transport from the airport to NextLevelCamp is easiest with a taxi, and it is a good idea to order it beforehand. You can order it by contacting Juan in taxi_transfer@hotmail.com
Important to remember that if you order the taxi beforehand, will the company pick up all those arriving about the same times with the same taxi/minibus, and this way you save ofcourse money. Also if you have a bike, it is good to order a taxi in advance, as the airport taxis are not always very happy to take bicycles.
This company has very reasonable prices.