I applaud your efforts, I am a professional volunteer community organizer and having lived in over 13 cities in 30 years have never lost that drive to engage with my neighbors and bring good through public events. Here are a few of my lessons learned, hopefully the will help:
1. Acknowledge every idea and person with openness and kindness, it will help mediate resistance to change and show you come from a place of good. PERSONALLY invite people to engage and participate. I know it is old school, but mass emailing or social network invites don't make people feel special or needed, and you lose the urgency behind your mission for EVERYONE to show up. --- This seems daunting and exhausting but it can be delegated to a strong host committee members who have in's in the community.
2. Find your ambassador(s). You need people that have been there for a long time, that people trust, to be on your side, or at least interested in seeing you succeed. What you lack as a newcomer is a following, you have to earn your place in the tribe before you can become a leader.
3. Never underestimate the power of your message. Make it visually interesting and important.
Good luck! Can't wait to see what you all do in Musfreesboro