Highlands allows everyone on the field after the game. If you really want you get can get close enough to the team to hear the post game speech, however I think most parents/friends stay away until they break it down. I can tell you some of the best family pictures we have was after a Highlands victory on the field with my son and the entire family that was in attendance. Any school not allowing this is missing out IMO.
I know Harrison County blocked all non player access to the field after the game when the Birds played there last year.