This might be on the cusp (in terms of NZ timing) of what is considered Historical Archaeology, but ASHA readers may be interested in this new publication on using high resolution wigglematch radiocarbon dating. Palisade posts from a Waikato pa and construction were investigated, and were dated at 1768+-4 (95% probability). Article information and a link to the article can be found below.
Hogg, A., Gumbley, W., Boswijk, G., Petchey, F., Southon, J, Anderson, A., Roa, T., Donaldson, L. 2017. The first accurate and precise calendar dating of New Zealand Maori Pa, using Otahau Pa as a case study. Journal of Archaeological Science Reports 12, 124-133.
The article can be found at: https://authors.elsevier.com/a/1UTMg,rVDBGCvC