Should he mount the podium in third or better in Auckland on Saturday, he said, he will qualify for the Superbodies class at the WFF World Championships being held at the Twin Towns Services Club in Coolangatta on the Gold Coast on November 2.
"I think I have a fair chance at placing at the nationals because there wasn't a lot who looked that strong in the athletic class in Christchurch and Wellington," he said.
"But everyone will be going for it in Auckland for sure, because we all want to go to the worlds. It's not held so close to us very often."
Smith said he will travel to the world championships in three weeks alongside his manager and wife, Robyn Omundsen Smith, regardless of the outcome this weekend.
"I owe Robyn so much for all the hard work she's put in to this as well - I might have pumped the iron but she's done everything else - and win or lose at the nationals, we'll be going to the worlds. Nothing could keep us away."