Warning! Unfortunately, as with many of the countries throughout the region, Cameroon's government officials are not shining examples of incorruptibility and visitors should be wary in dealing with them.
Travellers to the area between Waza National Park and Kousseri on the Chadian border should be aware that the US State Department has described it as 'particularly dangerous' due to acts of banditry. If you must travel between these locations, stick to the main routes and travel during daylight hours, preferably with the armed escort of Cameroonian security forces.
Walking at night around the streets of Douala, Yaoundé and some of the other larger cities is considered extremely unwise.