Defiantly do it Kaz, distance depends on wind direction, I've done 6Km across but one day it was a 14Km leg. If the tides are right get onto Arlington, you can do runs for kilometers across the reef in crystal clear water with nothing in sight for miles, awesome experience

My 6Km trip...
And my 14Km trip...
And if you're bored here's the video of the 6Km run across...