You are going to learn a lot. Congratulations, leading a team in a hackathon can be an exhilarating, terrifying experience. Create minimum (but not zero) forma

You are going to learn a lot. Congratulations, leading a team in a hackathon can be an exhilarating, terrifying experience. Create minimum (but not zero) formal communications and lots of informal routes with ways to find out information. Slack is a great suggestion along with periodic all-team checkins/reports. Set clear goals and a sense of mission, with open methods on how get there. As a leader, be involved and check in with team members to help clear roadblocks, connect resources and generally know where the team is at and their plans/progress/obstacles/workarounds is at any time. A sprint model can work well, with a board of tasks and periodic checkins on process.