I have done that trip a few times now, and even though it is well within your Boats capacity, it is a bloody long way, you will get bored sh!tless steering after a few hours I can tell you, Navigating is fairly easy, with proper charts and a GPS, you should also take a back up GPS, been there and done that with a dud GPS, as mentioned, there is a lot better places than the Whitsundays a lot closer to you, are you going just for the "holiday" of it all? it will also be a very nerve wracking experience for you, as any small click, squeak or rattle will see you grim faced at best, so best off to think long and hard about it all and set a much more realistic cruise speed to base your trip on, the boat is more than capable of speed, but not for days on end, also following a Game Boat is an option, but they will just go on when you will need to stop for fuel or weather conditions.