Raspberry Creek car park is 54 km west of Wānaka. The last 30 km of road are gravel, and several fords cross the final 10 km. They can be impassable after heavy rain; after 24 hours with little or no rain, they're usually passable for 2WD vehicles, including campervans. Check conditions before you drive in.
The track crosses private land. Keep to the marked route, respect livestock and leave gates as you find them. Camping isn't allowed until you reach the conservation boundary, and dogs aren't allowed at the site.