Unpredictable as weather is, one can only guess-estimate either by previous years and/or experience - that's why coming here asking for local folks about their own regarding bringing the right temp rating sleeping bag
We will be walking Kepler and then Milford and Routeburn starting on November 13th - my question is should a bring a 40F / 4C synthetic bag plus a liner that gives maybe increase the range another 10C (we will have merino underpants too) or just go for a 20F/ -6C down bag? Sure everyone is different regarding cold tolerance, but the concern here is a bit more with volume and weight of choosen bag
Any input/feedback will be greatly appreciated.
Thanks