My partner and I visited this national park, and it was so worth it. We loved that we were able to see a lot of it in half a day. We visited the elephant rock(hiked a trail around it), which is very cool, and then we drove back to see seven sisters and up to rainbow vista all the way up to Fire wave. I highly recommend hiking around fire wave because you will see some pastel looking rocks not far out.
We visited in February, and weather was in the low 50's. They charge $15 for non-residents.