A prayer meeting may only last for half an hour. Unfortunately, it's easy to tell when a prayer leader is unprepared. God will always be faithful to grace the group with his presence, but don't let that deter you from being excellent in how you prepare and lead. Always think of how you can make it easier for people to understand the requests and catch a vision to participate specifically in God's plans for campus. Sheep don't stop being sheep just because they're in a prayer meeting.
Leadership is still necessary.
The prayer leader sets the agenda and format of the prayer meeting so that people can be led through a meaningful time with Jesus. The agendas set are based on the issues and areas of need that the leader has been discerning. If prayer meetings are to be places where different kinds of people from various classes and walks come with a united voice, there must be clear direction and enough structure to set people free to pray. People need to be gently moved into confession, supplication and worship. Don't lead all the prayer meetings yourself just because you are the prayer leader.