Cairns Offroad Training and Tours replied:

Travelling with your bub will definitely be tuffer on all concerned but you are sensible ppl and you will handle it just fine. Sunscreen and a suitable for infant insect lotions are available.
Keep your bub well hydrated and always well shaded, never left in the car unless motor running and A\C on. Prepare for such things as teething, temperatures, etc maybe a chat with your family doctor as to medicines to be carried on an extended trip. A full cover type suit will keep him warm in the A\C and protect from bites etc. needless to say a quality baby seat will add to his and your comfort. Prepare well as I know you will, relax and enjoy the trip and bonding with your bub.
Cheers Rob

No Name replied:

Not having a baby would have been a good start!!! Dont let the dingos get it!

Paul replied:

See you up there, but we beat you. Well have a 2 1/2 year old and a 3 month old. Hope all goes well for us both. Just try to prepare things and then relax. It is meant to be fun after all. Some advise. If you havent already got one, buy a backpack to carry the child in, keeps you fit and children love them. Id recommend the MACPAC one from adventure stores like paddy palins. see you up north.