Walk ideas - 2 to 3 nights, Sep school holidays

Hi there
I'm organising to go on a bushwalk in the September school holidays in Tasmania.
I'd appreciate any suggestions for a good bushwalk for two adults and one 11 year old, two to three nights.
My son is pretty sturdy and stoic when it's come to any day trips we've done, but would be his first overnight camping trip and I'd like him to enjoy it, so not too many kms per day, leaving time to enjoy the surrounds. He's specifically asked to go bushwalking in a cold place at a cold time of year, but September will have to do him. He doesn't mind a few other people around but would prefer to avoid larger crowds.
I'm also planning a day trip to the snow somewhere, if there is still snow around, but I'm not personally keen on overnighting in a snowy area.
Thanks!
I'm organising to go on a bushwalk in the September school holidays in Tasmania.
I'd appreciate any suggestions for a good bushwalk for two adults and one 11 year old, two to three nights.
My son is pretty sturdy and stoic when it's come to any day trips we've done, but would be his first overnight camping trip and I'd like him to enjoy it, so not too many kms per day, leaving time to enjoy the surrounds. He's specifically asked to go bushwalking in a cold place at a cold time of year, but September will have to do him. He doesn't mind a few other people around but would prefer to avoid larger crowds.
I'm also planning a day trip to the snow somewhere, if there is still snow around, but I'm not personally keen on overnighting in a snowy area.
Thanks!