Grotska, since it's your first time going to Bloemhof make sure you are prepared for the sun, wind and heat. Take a proper gazebo with you and try to avoid those crappy "instant" ones that fold up, because when the wind picks up it will be ripped to pieces.
There are mangled gazebo frames scattered everywhere around Bloemhof and I've seen many of my neighbors pack up after a sand storm because their tents were blown to shreds.
Connect to one of the weather stations on the Weather Underground website that are close to the dam and check the forecast a few days before you leave. Don't worry about rain, it doesn't rain around here anymore, just check the wind!