The side striped jackal is found across a larger area than the black backed jackal, but are generally harder to see in the places where they are found. I have been lucky enough to see
them once or twice, in the Kruger. They are generally easier to spot when you are further north in the park (or at least we found that).
Mostly nocturnal, they are (like the black backed jackals) scavengers and will eat almost anything that they come across. They are omnivorous so can take advantage of fruit and other things that they will find. In terms of prey, they are capable of killing smaller antelope, as well as springhare and small mammals in the dry months, while in the wet months they eat a large amount of invertabrates.
They are also larger than the black backed jackals, but are naturally timid.
In terms of advice on seeing them, make sure you are in a reserve where they are found, and then try to find yourself in an area with less traffic. We have found, that while sightings are less common, they are often more exciting when they do occur.