Report any loss as soon as possible at the nearest police station and obtain a police report, you will need it for insurance purposes. You may be mugged. DO use official camp sites in the national parks where possible. If in doubt seek advice from the local police. Stray taxis picked up at random are risky.
Accidents are very frequent.
DON'T leave anything of value in parked cars. It is a criminal offence. It is illegal to work without a work permit even on a voluntary basis. DO consult your doctor for the right kind of pills or innoculations. DO make sure that you take the malaria pills before, during and after your trip.