r/Tramping

I'm an Aussie visiting the south island in early November for the Milford Track. I'm staying 3 nights in Glenorchy on my way back to Christchurch and I REALLY want to do the Earnslaw Burn track, it looks like a dream... However, I would be doing it on my own. Is this super dangerous? I would say I'm a pretty experienced hiker (lived and hiked vigorously in the Canadian Rockies for 2 years), am quite fit and not scared of a challenge. I'm not sure if all the scary reviews on alltrails are from inexperienced hikers who bit off more than they could chew but I don't want to get too attached to doing it and then not be able to manage. Any help is appreciated!