Hi! We are a family of 2 adults & 2 children traveling to Sydney end of April. We'll be staying for 4 whole days at the Hyde Park Inn w/c has a free CBD bus right by its doorstep. We plan to visit Opera House, Pylon lookout, Rocks, Taronga / Featherdale, Bondi, DH, fish market and the Blue Mountains. If time permits, perhaps Manly too. We have 2 luggage on wheels upon arrival. What should be the most cost effective way for our transport in Sydney? Should I get the MyMulti pass or just train / taxi from airport or pay per trip? After checking the MyMulti, I'm still confused. Is Sunday very busy in train stations for going to the Blue Mountains?