We have joined a number of tours in Australia. This one is the best. Both Korean tour guides are nice and take great photos. Although they speak Korean most of the time, they will clearly explain the meeting time and location in English, so no need to worry.
Here is the 2 days itinerary: ( we chose the all-included package)
Day 1 :Port Stephens- Dolphin watching, bibimbap lunch (delicious), sandboarding (bring glasses and masks), Oakvale Wildlife Park (can touch koalas and feed kangaroos).
Day 2: Featherdale Wildlife Park (have little penguin, can feed kangaroos), Lincoln's Rock, Three Sisters and Stargazing