Has anyone done the day trip through NSW TrainLink that takes you to the Blue Mountains from Sydney? It looks like there are two options- "Dayscape" and "ExplorerLink". Any recommendations or input? My significant other and I will be in Aus in June, we're on a tight budget and wondering if this would be worth checking out. Once arrived there, what kinds of things are there to do and are they quite pricey? Any feedback greatly appreciated!!!