I have to referee by myself tomorrow. Questions.?

I am refereeing an Ice Hockey game tomorrow, by myself. It is Micron game, which I guess is 6-8 years old. Not sure what that is in Canada. Anyways, I have only done games with a partner, and don't know what I should do by myself. Especially when the puck is in the zone, should I be way down on the goal line, or at the blue line, or around the hashes. Things like this, what should I do. Thanks