NZ cranberries are hardy, prefer full sun and can handle wind and hot temperatures. Mulch with sawdust or bark to keep the soil acidic and prevent drying out. Give them a bit of prune so the sun can ripen the fruit (March to May) but note fruit grows on previous year's growth.
Here's a job I did a month or so back.The pergola was covered in 3 types of vigorous pest vines (old man's beard, honeysuckle and jasmine). They'd run rampant and created a huge dense canopy from the fence to over the pergola.Putting my hedge trimmer to work I cleared all the pergola. The bank is ready to plant and the plants will now get the light they need to grow. You can see the dense matting by the fence - a project for another day. The resulting compost heap was taller and fatter than me.
Keep vines at bay
It definitely pays to keep on top of those pest plants.
Weedbusters can help you id pest plants at your place.