Hello, I’ve taken a look at your website and what a magic part of our country you live in! I can absolutely see the attraction for plenty of Kiwis to make the visit and take advantage of what you offer. Overseas guests will be a longer term challenge but I expect a renewed interest by all Kiwis to see their own backyard and support local before investing in overseas holidays will see your niche sector of the tourism industry bounce back well. The challenge is to get the message out now to secure future bookings.
There will be other contributors with more detailed info but I can recommend you visit Udemy online and take their digital marketing course (its only $10) which has a wealth of information on getting setup for online marketing. It is step by step and goes into detail in all subject matters (email, Instagram, FB etc).
I would also suggest you connect with other service providers on the QC Track and you could work together to drive foot traffic.
All the best