The 5 days trek is always AMBITIOUS, because paths are steep in parts, trails can be overgrown and rivers have to be crossed few times. While there is more food and stuff to carry, one guide and two porters have to go with you (if 2 or more guests go). Thats why the price per day per person is higher than for treks with 2, 3 or 4 days length.
To arrange a 5 days trek different routes can be taken into account. The route which is suitable for you should be discussed and fixed together with the guide before you go. All routes start and end in Ketambe and include searching for and observe orang-utans and other animals as well as trekking through difficult terrain.
All campsites, except C7, could be included in a 5 days trek. The campsite C4 can not be reached during the rainy season, because there is a very deep descent which can be dangerious when slippery. One possible route during the dry and the rainy season would be K-C1-HS-C6-C5-C3-C2-K, please compare with the map provided beside/below. Only people with good physical conditions should go on a 5 days trek. It is not suitable for children.