Welcome to posting. It's an addiction.
Keep in mind that many students are there to be inspired, so inspire them! It's important to have a bonded and cooperative team. Work towards team socials (bowling rocks), among other things, before the build season.
Getting community support is really important, so get out and give the team a goal to work for together, and have constant updates on how close you are to that goal. That way people stay motivated, and you can celebrate with pizza or something.
You may want to consider putting in an interview process for entering your team. You can either be selective in this process, or you could try to use it to find out what people are intersted in by having them fill out applications about their strengths and what they want to learn at the beginning of the fall. That way your season is year-around in a sense, and you can get more work and fundraising done.
Good luck!
- Genia