Alone, with 4 kids, a dog & a trailer.

I need the low down. With the trailer on the back of my car, I only get a bit over 500 kms to a tank of petrol. I need to know exactly how far between petrol stations & if there are any cheap places (eg caravan park) I can stay.

I'm on my own with 4 kids & my dog. Don't care how long it takes me to get across. I'm giving myself a week before I plan to move into my house, so heaps of time. Not much money for accomodation though...

If any one can help it'd be great. I'm planning to leave CW NSW around the 3rd Jan.