Congrats dad to be, we did 6 weeks last year with an 8 month old who started to crawl whilst we were away. We did the outback in the middle of winter, and a couple of hints from our trip were:
Have a thermos and boil your water before going to bed, that way you can make the bottles and add the hot water to your semi filled bottles till they are just the right temp without having to go out in the cold to boil the kettle.
We used the porta cot at night, with a cellular blanket drapped over the top so that it was like a cacoon to keep the warmth in and cold out. Worked a treat used a little low power led light as a night light (battery powered) so you could see what you were doing in the middle of the night.
During the day we used the porta cot when we got sick and tired of chasing our daughter through the dirt and wanted to have a cuppa.
We also used a portable dvd player when doing the long hauls, I think we know "In the night garden" back to front now. She was just at the stage where she needed a little more interaction than just looking out the window.
Most of all "Enjoy your time with your kid/s" they grow up way to quick and the sooner you can get them out in the bush travelling the better I reakon.
Give me the cruiser, camper and the road anyday over 9-5
Hope that when you do get to go on your first trip that you really enjoy it, and remember if it doesnt work, just try something else till you find what works for you and your family
Pat