From Mata Mata to Kgalagadi Transfrontier Park and back

I'll be in Namabia beguining of April and I would like to visit the Kgalagadi Transfrontier Park. My plan it's to enter from Mata Mata and back to Namibia from the same border. I'm not going to enter RSA from the Twee Rivieren Border Control (RSA).

It's the Mata Mata Border open to enter the park from Namibia?

It's possible to do this visit?