Volunteering at a Wildlife Reserve

We will be moving to Pretoria in a few months and I would like to get involved with hands on Wildlife Reserve work.  I am looking for something I can volunteer at and NOT work with birds (not a bird or reptile person!  lol)  I would mainly like to work with elephanats, monkeys and/or cats.  I know that Pretoria is not a prime hub for wildlife reservation, but does anyone know of somewhere close that I can volunteer some hours!   I am passionate about wild animals and would like to get a chance while living in Pretoria to give back and get up close and personal with wildlife.

Good luck! I am also interested in this line of work be great if anyone had information on how to get into this.