Got this from DOC in case you were thinking of popping up

Just to advise you that public vehicle access into St James Conservation Area will close for the winter period on Wednesday June 1st 2011. On that date the gate combinations will be changed. While staff will ensure there are no vehicles on the Maling Pass and Edwards Valley tracks before changing the combination, please ensure your vehicle is off St James Conservation Area by Tuesday night.
Vehicle access will reopen in late spring subject to road conditions. Please refer to the DOC website for the latest details, and we will also e-mail you with any updates closer to the time.