Ariah Park is a historic town of 500 people (or 509 when we are there!) The camping ground ($10 per night + $5 if you use air con) is next to the swimming pool complex.
They have three separate pools, a toddler pool, junior pool and a big pool with a diving board. Cost is $3 adult, $2 child, $1 under five, $1 spectator or a season pass for a family is $160.
So for $20 our family had a lot of fun!