Cheap powered camp sites in NSW

Hey lovely Mummas! (And daddy's)
So last year I purchased a massive tent to take the kids camping
I only took my eldest two to see if they would enjoy it and they loved it! So I am wondering if there are any places in NSW that have cheap powered sites that aren't near water? (2 and 1 year olds that are runners) I am not far from Sydney and I'm happy to travel a few hours
Thanks lovely ladies and gents and keep up the awesome advice you all give xx