"We've not done anything extraordinary, just kept them to the same systems," he said.
"There's been no extra training, we've been keeping it pretty low key. It's going to be a big enough occasion. We're trying to keep the pressure down and treat it like a normal game."
There will be more eyes on them than normal. Sky TV is broadcasting the final live, the kick-off pushed back to 2.30pm to suit the cameras.
Simpkins said he expected minibuses of supporters to make the trip over the Mamaku ranges to Hamilton Boys' High School.
Key players to look out for were captain Isaac Te Aute, Te Ra Whata and Tiaki Harrison.
"It's going to be an exciting game," Simpkins said.
"They've been really mature about it, keeping them calm. Whatever happens we want to enjoy our day and they're looking forward to playing in front of New Zealand."
Simpkins said despite their youth, the 1st XV was made up of players who had experienced sporting pressure before and had coped.
"The only way to get better is to put yourself under pressure. They felt that pressure with the sevens and touch."
Hopefully, they would use that experience about making the right decisions on Saturday.