Helpful advice needed Angus to Alice trip.

Hello,

We are planning a trip from the Angus Valley in SA to Alice Springs via The Flinders and travelling the Old Ghan Route.

We will have two horse drawn Gypsy Caravans, a Morris A40 ute and an assortment of older kids and dogs. We estimate approx 2 months to travel the distance.

Can anyone advise how we could find out sources of potable water on the trip as we will need to carry enough for four horses as well as the people between watering holes.

Thanks