G'day. Hope you enjoy your trip. I am planning a similar distance trip inabout six weeks. My wife and I are flying form Kununurra WA to Broken Hill in a technam P92 super echo. Plan to take 3 / 4 day and enjoy the scenery. Have planned legs of no more than roughly 2.5hrs at a time. Done this for a couple of reasons, (a) fuel stops (always nice to have the glass half full rather than half empty. (b) nice to stop for a chat,cuppa and stretch the legs and keep the mind alert.
I get as much pleasure out of planning a trip as the actuall trip itself, hope you do as well .
Regards Bruce