Have done the 8+ hour trip with a 6 month old. I have found the best thing to do is just go with the flow. If bubs is asleep, just keep on driving, if they need to feed stop and take what time is needed. I found if we tried to rush or wake to force in a feed, it just made things worse. Not sure if you are at that distracted feeding faze yet, but if you are, then you are better off feeding in the car when you have stopped or stopping at the roadside rest/truckie stops. Maccas and other roadhouses tend to be busy, so have to many distractions when all you want to do is sit, eat and feed bubs. Better to grab takeaway (or better pack your own to take) and eat where it is quieter. Rest stops you can have a walk, bubs can cry without disturbing people.