Bushwalk Australia

Hello all!
This is my first time posting in any forum ever, so I sincerely apologise if I am breaking any rules or conventions that I was supposed to be following. I'm a younger user of the internet, and missed out on the early days when forums were all the rage. Anyway!

Following the GNP fires, the opportunity to tick off a challenging trek has appeared! I've previously done an overnight to D'Alton Peaks, but I was wondering if a multi-day from Rosea Carpark to Teddy Bear Gap, heading south and ticking off Mt Warrinaburb, Mt Lang, Mt Frederick as we go is possible? I've done a few searches but haven't found anything!!
Naturally, water would be sourced from the little streams in between the peaks, and yes, it would be bushbashing the entire way. Hopefully the fires have made the bush less dense that what I've been battling with the last few years. Planning to sleep on/near the peaks of a few mountains, looks like ~7kms a day for 4 days, some scrambling and good elevation gain & loss.
Has it been done before? Are there any plans anyone has compiled previously of this route or similar?
This is not my first rodeo, but any tips for what I am expecting to be a difficult hike will be very much appreciated.
I'm not a stranger to setting hikes up without outside information, but I'd love to learn from others who've done this walk or similar.

Anywho! Not sure how to sign off on these things but I hope this is reaching the right people!
RubenSchmuben

Water will be a big problem until the weather turns. It goes without saying it's currently very dry. Mt William weather station is no longer reporting. Possibly destroyed in the fires.

Consistent with Parks Victoria's emerging approach to bushwalking, this walk would be illegal. Partly because dispersed camping is prohibited in the Grampians National Park and partly because access to the recently burned area is prohibited.