I can highly recommend the jungle trekking tour with Discover Sumatra! Together with my girlfriend we did 2 nights / 3 days trekking and it was an unforgettable experience! The organisation with Christine before our trip went smoothly and she was always there for any kind of question we could have. When we arrived in Medan, our driver picked us up. During the hike our guides were very helpful, attentive and patient with us. It is indeed an exhausting experience, but it is definitely worth it! We have seen over 20 orangutans and many other interesting species such as monitor lizards, hornbills or Thomas Leaf monkeys. The camps are beautifully situated by a river and we had the perfect cook for our meals! Everything was just super tasty, thanks again especially for that! The rafting back is a lot of fun and could go on forever. All in all our trip was incredible and they made one of our dreams come true!