Roger is correct. The top of the old 4WD track from Whites River can be hard to find. I'm tending towards starting at Guthega Power Station, getting the road bashing over. From GPS go up to the crest and the management track goes northish and a minor track goes left, to contour above Horse Camp. Take the latter - less climbing, no wet crossing below Horse Camp. This comes out below Whites River. Up to Schlink Pass. Start going to the left to avoid the rocks and then curve right. This gets you to Dickey Cooper Bogong, lovely open terrain with a few slightly exposed campsites, creeks here and there. Return via the pipes to GPS. Gungartan is a good side-trip, curving to the right, south-east, then NE and north. Avoid the boulder field, very nasty.
The pictures below are in December.

- Rolling Ground

- Rolling Ground camp

- South from near Dicky Cooper Bogong