We actually did it 2 weekends in a row.
https://www.strava.com/activities/22571489
https://www.strava.com/activities/23134130
Dustin's track gives you the general idea, but you can't start at Barbara Drive anymore. As you indicated, top of Skyline is a good place to start.. i.e. here:
https://www.strava.com/activities/21270270
Also, you're not gonna be on Cannonball too long. From Skyline you take:
red/white
cannonball
cannonball/red
yellow
red
blue (skylands)
race course
and back via fireroads to red and the way you came
More gnar:
red/white
cannonball
cannonball/red
yellow
blue
cannonball
blue (around bear swamp lake)
yellow
green
blueberry
fireroads to shepherds pond
race course
blue (skylands)
red
and back the way you came
This might help:
http://www.soundz.org/mtbnj/other/rwmap.jpg