One of my friends lives there, Lourens Voster, very nice place with large dam and some game too...
I would spend some time on the western side of the dam... as you drive into the farm for the first time after a bit you will go over the dam wall with the dam sitting right of you, once over the dam wall i would start fishing that side and slowly walking alongside away from the damwall... We,ve landed some monsters with flukes worked slowly, blueish/purple flukes and lizzards seems to work... but this was a while ago...
Either way you'll enjoy the outing, also ask if you can view the farm next to them, i think it's mafunyane or something, they,ve got some lion, rhino, leopard etc that you can get close to and see feeding...
Good luck and be sure to post some picks if you catch a few good ones...