Good venues in Joburg to Picnic/Camp and fish

Hi sealiners,I trust you are well ,Anyone know of good picnic and camping spots in Johannesburg where I could fish and spend the day or camp the weekend,If so pls would you kindly post these venues ._seal1_

R50 dam in Alberton +- 800m long by 150m wide
Rietvlei zoo farm small concert dam but fun