No other reviewers mentioned that the walk up is quite difficult and lengthy in my opinion. There are a number of stairs and in the heat, it's a little difficult. But SO worth it!
Definately go on a non-cruise ship day!
We almost fell over when we were charged A$100 (2 adults, 2 kids aged 13, 15) - however once again, it is worth it. Just be prepared.
I think the best way to not slip on the rocks is go bare foot. Nothing grips like your feet! Reef shoes are too slippery. And there are only a few rocky uncomfortable spots. No big deal.
Definitely get a local bus there! A$3 each. This gives you the flexibility to stay as long or short as you want. And there are plenty of buses waiting when you leave. I would allow a couple of hours to hang out here.
There is an area half way up to leave your belongings (I would recommend a backpack). I was quite surprised at this, there must be a trust system! But everyone else was doing it so we did too (with 4 iPhones, wallets etc)! Now that I think about it, yes the locals are very honest and wouldn't steal anything - however there may be the occasional dishonest tourist around?? So perhaps just take the bare minimum. Or lock your bag ??
You will most probably head to Hideaway Island for some snorkelling and lunch after Cascades. So if you have bought your snorkelling gear, ask to leave it at "reception" so you don't have to carry it all the way up.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.