The Postberg Section is only open to the public during springtime in August and September. The section is closed for the rest of the year.
Be there early to avoid queues. It's a popular part of West Coast National Park. Especially on weekends, it gets crowded. The flower season is depending on the amount of rain.
The flowers and game inside are a marvelous combination. You can either stay inside of the park what I recommend or in Langebaan and Yzerfontein. This time of the year is also the whale season. Therefore, I recommend a minimum stay of three nights. The park offers several hiking trails.