The difficulty does not include the way to Tanzania itself 
but from Parking.
At the Entrance Gate to Tarangire National Park everyone has to wait until the driverguide finished the paperwork.
Use the time to find the cache.
Go the way to the entry of the parking area. The road is fenced there with big stones. One of them is hidden one side by a small bush. Find the cache under some small stones at this side of the big stone.
Small note on cache maintenance: are here frequently, but as a backup have a local contact who will assist.