I'm asking for advice, and I do note a similar question has been asked in the past.
I am about to pull the trigger and buy tickets to hike the Overland Track, with my wife and toddler; around late December or early January. Yes, you are allowed to talk me out of it, that's part of the reason for asking. If we don't do the OT, we probably won't look at travelling to Tassie, this time at least.
We have done the OT before in late 2015, we took 24kg packs (will only do that once) and took 9 days with side trips and a walk around the lake. I also completed the OT solo in late 2017 with a 9kg pack + water, nearly got hypothermia on Mt Ossa on 22nd December and completed in 4 days, with the help of the ferry. As a side note, when I did the track in 2017 my wife was 6 months pregnant and walked to Leven Canyon including the Forest Stairs track, so we are both a little crazy .
My plan is to camp outside the huts, and likely skip one (eg. start off at dawn from a cabin near Ronnie Creek and skip Waterfall Valley - I did this in 2017); that makes it 5 days. I believe I can get our combined carry weight down to 20 kg + child, so we'd have about 16kg to carry each. We would use reusable nappies and hand wash as often as possible, and maybe use special liners designed for composting or simply take them with us (with extra hygiene & odur considerations). And yes, our child does enjoy outdoors and is social, we have done a few hikes with her so far. I also understand toddlers are not always agreeable and quiet, and at least with some huts there are places I can set up away from others. I've been planning this in my head for about 6 months, but now it's crunch time with tickets on sale Monday. Finally, I have no issues pulling the pin if weather is anything but relatively ideal, both of the other trips have been awesome weather.
Am I missing anything obvious for a long multi-day hike with a very young child? What extra precautions could I take (eg. will rent an EPIRB)?