Smith finished a 2-on-0 give-and-go with Karlsson shorthanded at 4:01 of the third for the 4-1 final.
"We're a hungry group, and we expect a lot from us this season," Smith said. "So it's great to come out of the gates with a big win."
The best part? They did it playing Vegas hockey.
"We just chased pucks down," Pacioretty said. "We make it so hard on their [defense] when we're playing that way. [The first forward] gets in there, and [the second forward] has to be close. And then also, we're such a fast team that we want [the third forward] to take away their options as well.
"We're at our best when we have five guys forechecking. All the forwards are close together. Once there is a turnover, we stay close together. We don't spread out the ice. We try and make plays in tight.
"That's just really hard to defend, because every time there is a turnover, every time you feel that you take away the puck from someone on our team, you should have one, two, maybe even three guys on your back trying to hunt it down.
"And that's playoff hockey. Whether it's preseason, regular season, we always want to play the same way."
If they play this way, the Golden Knights can go against the rest of the League.
"We're motivated, and that says a lot about the group that we have in here," Stone said. "Last year is over, and we're ready for an 82-game season, and it started tonight with a big win."