I will say ditto for you to go to Dunns River. Check private excursions vs ships tours....there is no need to overpay for this excursion.
Get everybody a pair of beach shoes, you will need them as the rocks are slippery. There is a walkway along side, if by chance someone does not want to walk the rocks, but, it sounds like you all will love the physicality of it..
Trip, with her book & tea!
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