If your looking for an overnight stop then you could aim for Mellvile's caves near inglewood. Do a search, as I posted a topic on it earlier this year. Also there is are nice paid camps at wedderburn, and charlton. we have stopped in there as a trip breaker to Mildura before. Also was up at Hattah very recently on an over nighter en route to Broken hill. Great camp, didn't want to leave.
Hope that helps.