Rugby fans have started to pour into Auckland campervan sites ahead of the third and deciding All Blacks and British and Irish Lions test at Eden Park on Saturday night.

Alexandra Park's sales and marketing manager Joel Reichardt said 120 campervans were already at the site, with 40 more expected tomorrow.

The park is expected to reach capacity with close to 200 campervans on Saturday.

Alexandra Park was one site which partnered with Auckland Tourism Events and Economic Development to deliver a pop-up campervan park.

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"Each campervan carries on average 2.5 people, so we are expecting around 350 to 400 people at the site on game day," Reichardt said.

Alexandra Park might just be a "good omen" for the All Blacks thanks to a proud historic connection to a critical Lions encounter over a century ago, Reichardt said

On July 25, 1908 the All Blacks beat the touring Anglo-Welsh Lions by 29-0 when they played at Alexandra Park, known then as Potters Paddock.

Twelve thousand people reportedly attended the Alexandra Park test match which was the deciding test of the tour.

The park had a "historical connection" to rugby, Reichardt​ said.

"The history of the park is significant, we have the Blues high performance centre here and the All Blacks practised and used our facilities in the past."

The Lions Tour has led to a significant boost in spending across the country.

Data from electronic payments company Paymark this week showed $904m was spent on food, alcohol and entertainment for the month of June - up 11.3 per cent on the same period in 2016.

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