With a 5:30 start and a 10 minute halftime the game should end around 6:45.

At which point it is impossible to get in the 5 minute break and coin toss, 5 minute first OT, 2 min break between OT periods, 5 minute OT period, 5-10 pre PK instructions and then the shootout.

No, the game ends in a tie. The referees need a break as well, and there is no way I am rushing to get my crew on the field to do a varsity match with no break between games.