Gerhard,
I have fished Bloemhoff, last year and I fished near Swartruggens for a couple of weeks this year. I liked both places although the former had tons of small carp although the catfish (barbel) were a bit bigger - to 35lb. At the venue I fished this year the carp were fewer but bigger although still not quite as big as hoped for (low 20's). I know the venue has since done fish to low 40's and hopefully there are bigger, so far uncaught, fish in there. I fished with a guide over there (Bruce Johnson of Eagle fishing safari's) and he ran an excellent camp and looked after us well.
I do love the country and there is a massive untapped potential for the fishing - not just for carp. I will almost certainly be back there next year but where I go depends on what the fishing is like on the new venues being fished at the moment. Oh and I'm from Hertfordshire in England, about 30 miles north of London (a damn sight colder than over there
).
Rob.