Basically you need to follow the N14/Krugersdorp free way west. you will come to a set of traffic lights, where you will turn right to follow the N14.
You will come to a T junction follow the N14 right again. A few hundred meters down the road the road splits, follow the N14 to the left.
Keep straight, I unfortunately cant give you how many Km's you need to drive. you will drive for some time and come to a large intersection 4way stop. you will see a factory of sorts in-front of you to the right. Go straight over the 4way stop.
at this point your pretty close. In a few hundred meters you will drive over a tiny bridge over a small stream.
once your over the bridge drive for another +- 900 meters. on your left you will see a small brown sign on a dirt road for trout hunters. Turn down the road a travel for another few hundred meters until you see a very small greenish sign on your left for tout hunters. this is the entrance to the farm. Its a long driveway, and its in bad repair.
Here is the map link on google maps. it might be easier for you to find your way from the map:
http://maps.google.co.za/maps?q=-26%C2%B0+6%27+10.89%22,+%2B27%C2%B0+39%27+8.27%22&oe=utf-8&rls=org.mozilla:en-US
fficial&client=firefox-a&um=1&ie=UTF-8&hq=&hnear=-26%C2%B0+6%27+10.89%22,+%2B27%C2%B0+39%27+8.27%22&gl=za&ei=-R6GS7CODIeH4Qatk4nEDw&sa=X&oi=geocode_result&ct=title&resnum=1&ved=0CAcQ8gEwAA
Its R50 per person for they day, C&R for Carp, Kurper and Bass. R70 per kilo for trout which they only stock in winter it seems.