The sole time I'd personally avoid the prepare could be the early early morning peak – say seven.30am-8.50am when trains are frequently actually crowded, and you could locate it difficult to enter using your luggage. Alternatively You should purchase an esim before you get there or on arrival from one https://sydneyinternationalairpor75505.bleepblogs.com/31028549/the-2-minute-rule-for-sydney-international-airport-taxi