Raider fan coming in peace with a couple questions about autographs & UoP Stadium!

Hey all! I'm planning on attending the first preseason game of the season. I actually live in Arizona so I never get a chance to see my Raiders play.

That being said, for anyone that frequents the stadium often, how easy is it to get autographs before or after the game? Where is the visitors tunnel located? And does anyone have suggestions on where to sit? Will security let you bring a football in?

I'm just wondering if it's worth trying, thank you guys!