The snippets describe two distinct "South Arm Campsite" locations in New Zealand — one on D'Urville Island (Marlborough) and one at Lake Manapouri (Fiordland).

Without a parent waterbody or more specific location detail to distinguish which is intended, the most prominent and well-documented is the Lake Manapouri site, but the D'Urville Island site is equally valid.

Since no parent waterbody is specified, I'll cover the Lake Manapouri site as it has the richest snippet detail.

--- South Arm Campsite sits on the shore of Lake Manapouri within Fiordland National Park, surrounded by beech forest in a remote and scenic setting.

The best access is by boat on the lake; the alternative route via Borland Road includes approximately 39 km of gravel with steep sections and tight corners, and has been subject to closures due to slip damage.

This DOC basic campsite offers tent sites and basic toilet facilities. No dogs are permitted. The campsite operates on a first-come, first-served basis with no bookings required.