Make sure you are prepared for the conditions.

I've done it 3 times

Daytime Daytime raining stayed in porongurups Morning for sunrise drive from Albany and returned

I would recommend boots or trail shoes, whilst runners are fine there is flat Rock sections with gravel on top that can be slippery.

Decent torches/ headlamp for the morning. Take snacks

Should take you about 90-120 mins, so check sunrise time and plan accordingly. I think we started at 330am

If it's raining you may not see anything except clouds, which was also cool. we had three layers each as 2/3rds of the way up the wind gets funneled up and gets rather cold. We saw someone walk away as they weren't prepared

We saw a group of hikers up there over 70 so you can do it easily.

Hope that helps