The Hogs play at LSU at 6 p.m. Saturday at Tiger Stadium. The Hogs won their last trip to LSU, an overtime affair two years ago.
"I came in here four weeks ago and told you we hope to get on a roll with these four home games," Petrino said. "I think we did that. Hopefully, we've grown up some.
Offensive guard Mitch Petrus isn't one of the young players. He's a fifth year senior with two trips to Baton Rouge under his belt. He looks forward to his third trip.
"It's one of my favorite places to play," he said. "No, it is my favorite road trip in the SEC. They have some great fans there. They do some crazy things."
Petrus said the Hogs will have to deal with a high noise level in Tiger Stadium.
"They have 90,000 in that place and it's the loudest place we go," he said. "We have to change some things. There are times when Ryan Mallett will give some verbal commands that I will try to make sure and turn my head so I can read my lips. And, sometimes, we have to watch the ball move to get the snap. You can't go on verbal cadence there."
Petrus isn't sure about the growing up process, but he does think the Hogs have "momentum" for this trip.
"That's what I'd call it, some momentum," he said. "You see that we have some things working now. We are playing better. It's one of those things where you find some things and then say, 'If it's not broke, don't try to fix it.' We are playing better and we are on a roll now."
The LSU defensive system has changed with a new defensive coordinator.
"Last year, they stayed in their base," Petrus said. "I think the philosophy was that they have four great defensive lineman and just say, 'Come try to block us.' This coordinator runs a lot of stuff. Last year, they didn't play any games up front. They do now. They have a lot of fronts and a lot for us to get ready to play. They have a lot in their scheme."
Petrino said the Hogs should have some confidence headed to Baton Rouge, especially running back Dennis Johnson. Johnson was the main back last year when the Hogs rallied past the Tigers. He's in the same situation this year, taking over for injured Michael Smith.
"I'd think he would have confidence," Petrino said. "He's experienced success against them. It's a different scheme, but a lot of the same players."
Johnson said, "I do have confidence. I try to have confidence every time, whether it's returning kicks or getting in there at running back. I just try to go out there and play."