Done it a few times, in cars and on bikes.
It's an easy bitumen road from Buchan all the way to near Suggan Buggan. Buchan caves has great camping, but can be very busy. The caves tour is definitely worthwhile.
Turn right past Seldom Seen ( check the collection of 'sculptures' and junk at the 'servo' - it's currently for sale) cross into the Snowy River NP, about an hour down to McKillops Bridge. Another interesting narrow winding road with great views along the way, is steep in parts but quite do-able, have towed a camper all though here no worries. Most of the camping areas near the bridge are uneven and rocky. It's worth a swim on the river though on the eastern side of the bridge.
Back on the main road north again from Seldon Seen, you travel on a good dirt road through some nice grazing and farming country, and onto the Barrie Way, and the road then becomes single lane with high vertical cliffs on one side and a big drop on the other. Interesting. Watch for oncoming traffic
You later drop down alongside the Snowy itself, where you cross into NSW. there are a few very nice campgrounds through this section, as well as a lookout or two, all are worth a stop.
Winding its way higher away from the river again, you come to the lookout with some info boards etc about the road. About 50-60 kms to the north its all good roads into Jindabyne.
Enjoy.