Many municipal councils need to upgrade their infrastructure to support travellers. There is 80,000 to 100,000 people travelling around Australia at any one time. They all spend money and will avoid towns that do not have suitable infrastructure. Instead they will spend their money in towns that can meet their travelling needs.
The answer is that you need everything you'd bring on a 1 day backpacking trip, except for a little more food, fuel, toilet paper, and what ever other extra consumables you need to stay out an additional 2 days.
THIS ARTICLE: Details how to send updates home from the field. It covers how to update your blog, send Tweets or leave voicemail from remote places; what software and technology you might need; and why you might want to do any of this. There are also studies of recent expeditions.