Hi, have been reading a lot about the need for reef shoes while in Rarotonga. Having looked at the ones available at Big W I am sure they would not provide much protection as the sides are soft! Sure, they are cheap but are they adequate or not? Rays Outdoors have sturdier ones but they are an eye watering $199.00. For a 6 day holiday this would be way too expensive. Any suggestions?( I don't want to know what can be bought in the USA...useless to us here in Australia as postage costs are prohibitive) So, Aussie recommendations only, please.