''It was great that Kiwis were getting out there and enjoying their own country, and we enjoy hosting them. I pinched myself a couple of times, wondering if the figures were sustainable. Now, with fewer people moving about, we'll just have to wait and see," he added.
The record-breaking July was not confined to the Bay of Islands. Di Maxwell, owner of Kaikohe's Left Bank Hotel and Mint Restaurant, said takings were up 71 per cent on the same time last year.
She had hired three extra staff, and was looking for more.
''The forward bookings in accommodation are huge. They go right through to next April,'' she said.
Many hotel guests were corporate clients who had stayed in Paihia until Left Bank opened two years ago. It was also popular with cyclists, mainly from Auckland, riding the Twin Coast Cycle Trail.
The restaurant enjoyed ''fantastic support'' from local residents, and had ''great Māori chefs'' producing local dishes and bringing out local flavours, Maxwell said.
Initially she was nervous about Covid's effect on the business, but after delving into tourism statistics she felt hopeful that New Zealanders holidaying at home would offset the loss of overseas visitors, who in any case only made up 10 per cent of Left Bank guests.
''We even thought we might have an increase, but we didn't expect this much,'' she said.
According to Tourism NZ, international visitors brought $17 billion to New Zealand in 2019, but at the same time New Zealanders spent about $9 billion overseas.
Maxwell said she hoped the latest outbreak was ''just a blip.''
''The government's handling it well, we have to take what comes. When you're in business there are constant blips," she said.
Waitangi National Trust chief executive Greg McManus said July visitor numbers at the Treaty Grounds were up 59 per cent on the same month last year, and the number of domestic visitors was up 266 per cent, more than making up for the loss of overseas tourists.
''It was like summer. It was fantastic," he said.
He had had to bring in extra staff, and put on more guided tours and cultural performances, over the July school holidays.
August had also been ''going gangbusters,'' with large numbers of retired couples in campervans and South Islanders exploring Northland for the first time.
McManus had hoped for a repeat in the October school holidays, although it could now ''all come crashing down.'
Meanwhile Elliffe said Covid was changing the nature of tourism.
''One of the predictions when we were first looking at life after Covid was that we'd see a trend towards slow tourism, in which people experience attractions in greater depth and in a more meaningful way. Heritage fits that quite nicely," he said.