But one thing the Invercargill psychiatric nurse does not have with him is a sleeping bag.
He is part-way through ''Below Five-0'' - his personal challenge to run 170km around the island's southern and northwest track circuits in 50 hours - and that means running through the night.
Mr Hamblett (41) left Invercargill yesterday and was due to start running at midnight last night.
If all goes according to plan, he will finish by 2am on Saturday.
An experienced runner and tramper, he said he had completed the route at least a dozen times before. Last year, he ran it in three days, eight hours and 40 minutes, sleeping during two nights and running through the other.
He will wear a helmet light at night, hoping that will be enough to keep him safe.
''There's plenty of wildlife out there. I hope I won't bowl over any kiwi or bowl into a deer.''
He is also eating on the go and has with him easily accessed food including high-energy powdered milk drinks and pemmican, a mix of dried animal meat and fat.
Mr Hamblett made his own pemmican from venison, admitting eating it was ''an acquired taste''.
Formerly a laboratory technician, Mr Hamblett moved to Invercargill nine years ago to retrain as a nurse.
He now works for the Southern District Health Board Mental Health and Intellectual Disability Service.
His challenge is a fundraiser for the Mental Health Foundation.
He said he was inspired to do his bit for the organisation because of the good work it did with people overwhelmed by illness or life circumstances, and after reading about Mal Law's High Five-0 Challenge in support of the Mental Health Foundation.
Mr Law, who lives in Wanaka, leaves on February 7 to scale 50 peaks and run the equivalent of 50 marathons in 50 days.
So far, Mr Hamblett has raised more than $800 in donations and pledges, while Mr Law has raised more than $248,000 and is sure to exceed his target of $250,000.
Mr Hamblett said the money he raised would be contributed to Mr Law's cause.
To make a donation to the High Five-0 challenge go to www.high50.org.nz/
