Need guideline about to Bushwalking tour with Money Saving

Hi, I want to find ways to save money and fulfill all my needs when I go with my family on the Queensland Picnic bushwalking tour.

I searched the web, also visit Finder .com, EMUCoupon .com best online discount providers in Australia but I couldn’t get something interesting, please can someone guide me for all about, how can I avoid to spending at unnecessaries.
Thank you very much!