Overnight Rides

I got a message from a friend asking for any suggestions for places to do a multi day ride where they take tents and camp. Me being the race junkie I am, doing those types of rides are about the last thing on my mind, and I have no idea myself where a good place to do such a ride is but was wondering if anyone had any ideas of a good overnight (I guess one or two days) ride and how to do it. Thoughts that jump to mind are Northern Blue Mtns (the Bells Line side) and GNR up north to Bucketty, but are there any ideas of whether this is worthwhile?

Cheers, Tristan