Gameday questions

Hi folks - been reading the posts for years now and actually joined years ago, but never posted anything. I am taking my son to his first game on Sunday, 12/19. We're wondering what kind of pre-game things there are to do once in the stadium. I know gates open 2 hrs before kickoff, but are there players around to get autographs or pictures with, etc.? Or do we basically go in and find our seats and that's it? Trying to determine if it is worth getting there really early or just wait until closer to kickoff. Any other game I've gone to I tailgated with friends and never made it in the stadium early enough to know what happened. Thanks!