Have a look at far east Cape Conran, Tamboon Inlet & Mallacoota if into beach and bush walks.
Gippsland Lakes - Lakes Entrance & Lake Tyers more touristy but might be good for the kids.
South Gippsland - Inverloch and Wilson Prom or Philip Island could be worth a look
Happy to chat more at Mansfield around the campfire if more info required, but Philip Island and the nightly Penguin Parade coupled with time at Tidal River or Walkerville around Wilsons Prom could be good with kids, and not too far to drive
Footnote:
It's astounding, time is fleeting
Madness takes its toll
But listen closely, not for very much longer