The Conservatives had already identified major groups as potential supporters and the first of those was "senior New Zealanders," who connected with the party's values.
"Surprisingly a number of young people are also showing interest," he said. "People said we wouldn't pick up support from that demographic, but we are. They're young people who haven't had clear political allegiances but are now looking at a party they can identify with."
And membership was also coming from National voters followed by disenchanted Labour and NZ First voters.
His party would be trying to put up candidates in every seat except the Maori seats. "That's a principle decision because we're a party calling for a referendum on whether there are Maori seats in the first place. We don't think there should be."
The Conservatives would be targeting specific seats and these would include rural electorates and electorates where there was a concentration of older New Zealanders, including Whanganui.
Looking ahead to the general election in September, Mr Craig was upbeat. "Every public meeting we've had and every contact with people is producing members for us - they like what we're saying. "We've got over 6000 members ... contrast that with ACT, NZ First and United Future. Based on polling and looking at where New Zealand is at, there's room for genuine conservative party that does hold more traditional Kiwi values."
If the Conservatives did get candidates into Parliament, his party could work with either of the two main parties. "But it gets difficult with the Greens because a lot of their policies we don't believe would ever be able to work without a huge tax increase. And we have the same difficulty with the Mana-Dotcom grouping as well."
Mr Craig believed support was also growing because of the party's no-nonsense manifesto and one of these was the party's view on law and order. "We are much tougher on law and order than either National or Labour. You can still murder someone in this country and, with good behaviour, be out within 10 years," he said.
The party was pro-active in terms of business but would take a more pragmatic view of issues like the emissions trading scheme. "None of our major trading partners are aligned to it, so asking our businesses to compete against those nations is madness. And free trade with China, which doesn't play by our rules, cheats on the environment and pays people diddly to work, doesn't stack up in our view either," he said.
Other major points of the party manifesto were binding citizen-initiated referenda, and seeing the family unit as a foundation of society.